Many medieval English titles have withstood the test of time — the monikers of “queen,” “duke,” and “earl,” for example, evoke the same significance now as when they were coined. However, one particular title has undergone a surprising transformation: bachelor. Once a term for a young knight, “bachelor” now designates an unmarried man, a shift that took centuries to complete.

Like many English words, “bachelor” was derived from Old French, appearing in various Middle English spellings including “bacheler,” “bachelier,” and the familiar “bachelor.” During the Middle Ages, the title was styled as “knight bachelor,” denoting the most common or basic type of knight, typically a young man without a title or land. Eventually, knights ascended through the hierarchy and gained new titles. The subsequent ranking, the knight banneret, served as a commander of a company of knights.

The etymology of “bachelor” earlier than Old French is debated. One leading theory points to the Medieval Latin baccalarius, meaning “vassal farmer, adult serf without a landholding.” This term is rooted in baccalaria, referring to fields or land under a lord’s control. Another theory proposes a simpler origin from the Latin baculum, meaning “a stick,” because a squire would practice with a staff instead of a sword, symbolizing a beginner status.

By the end of the Middle Ages, knights became obsolete on battlefields with the rise of gunpowder, and the term “bachelor” expanded in usage, melding the two Latin roots with a sense of a novice young man with no land or title. It slowly became a word for any unmarried man, regardless of knighthood status. It conveyed a sense of youth and inexperience, and as such, by the end of the 14th century, “bachelor” also represented someone who had obtained the lowest degree at a university — a bachelor’s degree.

As the centuries progressed, the medieval connection between “bachelor” and knighthood has been nearly forgotten. The word is firmly entrenched in modern English wedding vernacular, where “bachelor party” has described prewedding festivities since the end of the 19th century. This is also when “bachelorette” emerged in English, formed by adding the French suffix “-ette” to “bachelor.” At first glance, the “bachelor” of the raucous “bachelor party” or a modern “bachelor pad” seems to stray far from its original usage, but its etymology reveals a strong connection between the definitions by exemplifying how societal roles change (and how they stay the same) over time. 

Maybe you’re in a quiet train car and someone is talking loudly on their phone, or you’re around the corner from colleagues chatting in the break room and they don’t know you’re there. However you end up in that situation, sometimes the juicy details of another person’s private conversation are too tantalizing to resist, and now you’re an eavesdropper. “Eavesdropping” is a catch-all word that refers to any sort of aural snooping, but it wasn’t always that way. Early eavesdropping took place in a very specific location, from which the term got its name.

The word “eavesdrop” comes from “eavesdrip,” which was coined in an Old English charter from 868 CE, though it had little to do with snooping and more to do with architectural features of a house. “Eavesdrip” referred to the area around a house where rain fell off the edge of the roof (extensions known as “eaves”) and onto the ground. 

Sometime before the 1500s, the architectural term evolved into “eavesdrop,” and it also acquired its modern connotation of snooping. If someone was an eavesdropper, they were known to stand in close vicinity around a house so they could secretly listen in on the private conversations happening inside. In 1515, one text warned citizens about “Euesdroppers vnder mennes walles or wyndowes… to bare tales.” Another citation from 1611 reads, “To eaue-drop, to prie into men’s actions or courses.” Despite the variations in spelling, you can see “eavesdroppers” had much the same reputation back then as they do now.

In time, “eavesdrop” shed its very literal definition. Someone no longer has to literally stand beneath an eave in order to eavesdrop — neighborhood busybodies are just as comfortable picking up gossip on their front porch or on the phone as they’re standing under the eaves. 

More often than shoppers might realize, everyday products come to be known by the name of the brand most associated with making them. Although a product may have a generic name (e.g., facial tissue), a company name (e.g., Kleenex) has become the more universally accepted term for the product. 

This phenomenon is called “genericization,” and it happens when a trademarked (aka brand) name is so widely used that it becomes the product’s identifier. Just look at Band-Aids, the brand name now commonly used to refer to any sort of adhesive bandage, orQ-tips (synonymous with cotton swabs) and, of course, Kleenex. These are some of the more well-known examples, but plenty of other brands have benefited from genericization as well.

“Vaseline” is a brand name for petroleum jelly, a multiuse product found in virtually every drugstore. Today, you might hear “Vaseline” used to refer to petroleum jelly-based products in general, even though competitors such as Aquaphor serve the same purpose. So why has “Vaseline” become the preferred term? The answer is simply that it’s been around the longest: Vaseline became the first commercial petroleum jelly 150 years ago, and is now the most popular and enduring manufacturer of the stuff.

“Styrofoam” is the brand name of a polystyrene foam product created by the Dow Chemical Company in 1941. The name is often used to describe any foam container, especially of the variety used to contain food and beverages, but these containers are actually made of expanded polystyrene foam — not Styrofoam at all. The real Styrofoam is manufactured by Dow for building insulation.

The term “Dumpster” was coined in November 1936, when George Dempster of Knoxville, Tennessee, introduced his line of large garbage bins that could be picked up by a specialized truck. He named the bins after himself, calling them “Dempster Dumpsters.” Thus, “Dumpster” became a genericized term for a mobile garbage receptacle in the United States. In the U.K. and other English-speaking countries, they’re usually called “skip bins.”

“Popsicle” is in fact a trademarked brand name for ice pops, owned by Unilever. The history of the Popsicle begins more than 100 years ago in 1905, when 11-year old Frank Epperson invented flavored ice on a stick and called it an “Epsicle,” using the root of “icicle.” In 1923, Epperson patented the Popsicle (renamed because his children insisted on calling them “Pop’s ’sicles”), which was eventually bought by Unilever; the company soon began creating other product lines such as the Creamsicle and Fudgsicle (which are also trademarked terms).

Most Americans refer to plastic flying discs as “Frisbees,” but that term is actually the brand name of Mattel Toy Manufacturers’ patented disc. Mattel bought the toy in 1994 from Wham-O, which became the first company to produce them in 1957. 

The unique name stems from the Frisbie Pie Company in Bridgeport, Connecticut, which supplied pie tins to college campuses, where students would throw the empty tins at each other, yelling “Frisbie!” The nickname for the flying discs caught on, and Wham-O decided to adopt it for their new “Frisbee” toy. The Wham-O designer also developed the concept of “Frisbee golf,” another extension of genericization, because the popular game can be played with any type of flying disc.

“Velcro” received the genericization treatment because “hook-and-loop fastener” doesn’t have quite the same ring to it. Velcro is a trademark owned by the U.K.’s Velcro Companies. The original design was named by combining the words “velvet” and “crochet,” an apt textural description of the product’s two different sides. 

In a satirical music video, company “lawyers” beg consumers to stop using the name “Velcro” when referring to other generic products. The “Don’t Say Velcro” campaign attempts to educate consumers on the difference between genuine Velcro products and other similar products in an attempt to prevent further genericization of the brand.

“Jacuzzi” is often treated as a synonymous term for any type of bubbling hot tub. But the word is actually a proprietary name belonging to Jacuzzi — a private company that makes bathtubs, showers, and other similar products. The origins of both the company and its name date to the early 20th century, when two brothers named Valeriano and Francesco Iacuzzi immigrated to the United States from Italy. Upon their arrival, an immigration official mistakenly wrote down their surname as “Jacuzzi,” and it stuck. 

The five other Iacuzzi/Jacuzzi siblings eventually made their way to the U.S. as well, including Candido, who invented a hydrotherapy pump in the 1940s. This pump was developed into a product meant for home use, which could turn any normal bathtub into a spa-like experience — and thus the first Jacuzzi-brand tubs were born. The term is trademarked by the company, meaning only hot tubs manufactured by Jacuzzi can accurately be referred to as such.

Anyone who’s ever undergone a serious dental procedure has probably been injected with Novocain, a powerful numbing agent. But Novocain (the original German spelling — it’s spelled “Novocaine” in the United States) is the name of a product rather than a generic drug. 

This trademarked term is owned by Hospira, Inc., and is used for a drug known as “procaine hydrochloride.” Novocain specifically was invented by German chemist Alfred Einhorn in 1905 as a replacement for cocaine, which was a popular anesthetic  prior to Novocain’s creation. Einhorn chose the name “Novocain” as it combined the Latin nov- (“new”) with the suffix -caine, which was commonly ascribed to alkaloid anesthetics.

In 1957, Marc Chavannes and Al Fielding created a textured plastic intended to be used as wallpaper, which was originally called “Air Cap.” Shortly thereafter, the product was renamed “Bubble Wrap,” which has developed into a widely used genericism today but is actually a trademarked term owned by the Sealed Air Corporation. While similar sheets of plastic containing fun-to-pop bubbles of gas are available on the market from other manufacturers — under generic terms such as “bubble packing” — true Bubble Wrap comes from that specific company.

This may not be a product, per se, but Realtors provide an important paid service to those searching for a new home. However, the term “Realtor” refers to a very specific individual who’s a registered member of the National Association of Realtors (NAR). So while you may receive similar services from a nonregistered real estate agent, it would technically be incorrect to call them a “Realtor.” 

Registered Realtors adhere to a strict code of ethics and are authorized to use the term, suggesting you may receive a special level of service that stands out above the rest. The NAR says the preferred way to format the word is “REALTOR” in all caps, as that’s how it’s registered.

The Seeing Eye is an organization based in Morristown, New Jersey, that’s been training dogs to guide visually impaired people since 1929. It was the first guide dog school founded outside Europe and is the oldest extant guide dog school in the world. Because it’s so well known, the term “Seeing Eye dog” has become synonymous with guide dogs in general, especially those trained to assist people who are blind or visually impaired. When you’re speaking generically, however, you should use the term “guide dog” — save “Seeing Eye dog” for pups that have been specifically trained by the Seeing Eye organization. 

My 5-year-old has unique dance moves with jumps and spins I’ve seen nowhere else. As a proud mother, I’ve been tempted to describe his breakdancing attempts as “very unique,” but the grammarian in me knows my child could not possibly be described as such. It reminds me of this saying, often attributed to anthropologist Margaret Mead: “Always remember that you are absolutely unique, just like everyone else.”

Grammar rules dictate that “very unique” is incorrect because “unique” is an absolute adjective — it either is or isn’t. Other absolute words include “perfect,” “empty,” “complete,” and “infinite.” Each of these words describes a distinct state. There is no “very infinite” or “very perfect.” If a thing is truly unique, then there is nothing else to compare it to. 

Meanwhile, the adverb “very” is an intensifier, which strengthens whatever word it accompanies. Other intensifiers include “really,” “extremely,” and “particularly.” These adverbs don’t create a comparison as “more” or “less” do, but they suggest degrees of measurement. For example, compare an “important person” to a “very important person” — there’s a reason the VIP gets special treatment.

“Unique” is French, from the Latin unicus, meaning “only,” and it became part of the English language with the same meaning in the 17th century. But in modern usage, the word has evolved beyond the singular “only” to a broader meaning of “unusual” or “distinctive.” These are not absolute words. Something can be “very unusual” or “very distinctive,” but not “very one of a kind.” 

However, because language is always evolving, “very unique” has become increasingly common in casual speech. This use reflects a shift in meaning where “unique” is not an absolute, but rather a sliding scale of distinctiveness. My son’s moves are certainly unequaled, but I’ll stick with grammar guidelines on this one and use alternatives such as “truly unique” or “extraordinarily different.”