Merriam-Webster's Word of the Day for December 5, 2025 is:
inoculate • \ih-NAHK-yuh-layt\ • verb
To inoculate a person or animal is to introduce immunologically active material (such as an antibody or antigen) into them especially in order to treat or prevent a disease. Inoculate can also mean "to introduce (something, such as a microorganism) into a suitable situation for growth," and in figurative use, it can mean "to protect as if by inoculation" or "to introduce something into the mind of."
// In 1796, the English physician Edward Jenner discovered that inoculating people with cowpox could provide immunity against smallpox.
// The cheese is inoculated with a starter culture to promote fermentation.
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Examples:
"Truffle farmers ... inoculate oak or hazelnut seedlings with truffle spores, plant the seedlings and wait patiently often a decade or more for the underground relationship to mature. The eventual harvest is a reward for years of cooperation between tree and fungus." — David Shubin, The Weekly Calistogan (Calistoga, California), 30 Oct. 2025
Did you know?
If you think you see a connection between inoculate and ocular ("of or relating to the eye"), you have a good eye—both words look back to oculus, the Latin word for "eye." But what does the eye have to do with inoculation? Our answer lies in the original use of inoculate in Middle English: "to insert a bud into a plant for propagation." The Latin oculus was sometimes applied to things that were seen to resemble eyes, and one such thing was the bud of a plant. Inoculate was later applied to other forms of engrafting or implanting, including the introduction of vaccines as a preventative against disease.
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frowsy
Merriam-Webster's Word of the Day for December 4, 2025 is:
frowsy • \FROW-zee\ • adjective
Something described as frowsy has a messy or dirty appearance.
// The lamp, discovered in a neglected corner of a frowsy antique store, turned out to be quite valuable.
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Examples:
“Footage from his early shows is sublime. In one, models with frowsy hair totter along the catwalk in clogs, clutching—for reasons not explained—dead mackerel.” — Jess Cartner-Morley, The Guardian (London), 4 Mar. 2024
Did you know?
Despite its meanings suggesting neglect and inattention, frowsy has been kept in steady rotation by English users since the late 1600s. The word (which is also spelled frowzy and has enjoyed other variants over the centuries) first wafted into the language in an olfactory sense describing that which smells fusty and musty—an old factory, perhaps, or “corrupt air from animal substance,” which Benjamin Franklin described as “frouzy” in a 1773 letter. Frowsy later gained an additional sense describing the appearance of something (or someone) disheveled or unkempt. Charles Dickens was a big fan of this usage, writing of “frowzy fields, and cowhouses” in Dombey and Son and “a frowzy fringe” of hair hanging about someone’s ears in The Old Curiosity Shop. Both senses are still in use today.
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alchemy
Merriam-Webster's Word of the Day for December 3, 2025 is:
alchemy • \AL-kuh-mee\ • noun
Alchemy refers to a power or process that changes or transforms something in a mysterious or impressive way.
// They practiced their alchemy in the kitchen, turning a pile of vegetables and legumes into an extravagant meal.
// The shopkeepers hoped for some sort of economic alchemy that would improve business.
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Examples:
“Forty years ago, the Nintendo Entertainment System hit North American shores, singlehandedly resurrecting the video-game market after its infamous post-Atari crash in 1983. To do so, it needed a heavy hitter, a killer must-have title that could put butts in seats and lock audiences into the tube TV until their eyes bleed. That game was Super Mario Bros.—a product so potent, its exact alchemy has never been re-created.” — Christopher Cruz, Rolling Stone, 18 Oct. 2025
Did you know?
Alchemy—the medieval chemical science and speculative philosophy that focused on the attempt to change less valuable metals into gold, to find a universal cure for disease, and to discover a means of prolonging life indefinitely—was practiced in much of the ancient world, from China and India to Greece. Alchemy as practiced in ancient Egypt was later revived in 12th-century Europe through translations of Arabic texts into Latin, which led to the development of pharmacology and to the rise of modern chemistry. The word alchemy was first used in English in the 1400s, and by the mid-1500s it had developed figurative senses relating to powers and processes that can change or transform things in mysterious or impressive ways.
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cajole
Merriam-Webster's Word of the Day for December 2, 2025 is:
cajole • \kuh-JOHL\ • verb
To cajole someone is to use flattery or gentle urging to persuade them to do something or to give you something. Cajole can also mean “to deceive with soothing words or false promises.” It is often used with the word into.
// She cajoled her partner into going to the party with her.
// They hoped to cajole him into cooperating with local officials.
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Examples:
“... I cajoled my father into letting me use the company season tickets which were supposed to be used for clients, but sometimes wound up in my hands.” — Sal Maiorana, The Rochester (New York) Democrat and Chronicle, 22 Oct. 2025
Did you know?
However hard we try, we can’t cajole the full history of cajole from the cages of obscurity. We know that it comes from the French verb cajoler, meaning “to give much attention to; to make a fuss over; to flatter or persuade with flattery,” and goes back to the Middle French cajoller, meaning “to flatter out of self-interest.” But the next chapter of the word’s history may, or may not, be for the birds: it’s possible that cajoller relates to the Middle French verb cageoller, used for the action of a jay or other bird singing. Cageoller, in turn, traces back to gaiole, a word meaning “birdcage” in a dialect of Picardy.
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pseudonym
Merriam-Webster's Word of the Day for December 1, 2025 is:
pseudonym • \SOO-duh-nim\ • noun
A pseudonym is a name that someone (such as a writer) uses instead of their real name.
// bell hooks is the pseudonym of the American writer Gloria Jean Watkins.
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Examples:
“Edgar Wright, the filmmaker and genre specialist who has given the world modern gems like Shaun of the Dead, Hot Fuzz, and Baby Driver, estimates he was around 13 years old when he read ‘the Bachman Books,’ a collection of four novels that Stephen King published under the pseudonym Richard Bachman during the early years of his career.” — Don Kaye, Den of Geek, 9 Oct. 2025
Did you know?
Pseudonym has its origins in the Greek adjective pseudōnymos, which means “bearing a false name.” French speakers adopted the Greek word as the noun pseudonyme, and English speakers later modified the French word into pseudonym. Many celebrated authors have used pseudonyms. Samuel Clemens wrote under the pseudonym “Mark Twain,” Charles Lutwidge Dodgson assumed the pseudonym “Lewis Carroll,” and Mary Ann Evans used “George Eliot” as her pseudonym.
Brasil