Merriam-Webster's Word of the Day for October 20, 2025 is:
etymology • \eh-tuh-MAH-luh-jee\ • noun
An etymology is an explanation of a word’s history—that is, where the word came from and how it developed.
// As a word nerd, I’m always eager to learn a word’s etymology and trace it back to its earliest known origins.
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Examples:
“A recent Vogue bride, Nicole Amarise, changed her name—as did her husband. ‘Together we opted to create a new one for our new life together,’ she says. ‘We gave ChatGPT information about the etymology of our old surnames, and guided it to generate surname options for us that could relate to our heritages and cultures.’” — Shelby Wax, Vogue, 16 Aug. 2025
Did you know?
The etymology of etymology itself is relatively straightforward, so we won’t bug you with a lengthy explanation. Etymology ultimately comes from the Greek word etymon, meaning “literal meaning of a word according to its origin.” Etymon in turn comes from etymos, which means “true.” Be careful not to confuse etymology with the similar sounding entomology. Entomon means “insect” in Greek, and entomology is a branch of zoology that deals with insects.
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veritable
Merriam-Webster's Word of the Day for October 19, 2025 is:
veritable • \VAIR-uh-tuh-bul\ • adjective
Veritable is a formal adjective that means “being in fact the thing named and not false, unreal, or imaginary.” It is often used to stress the aptness of a metaphorical description.
// The island is a veritable paradise.
// The sale attracted a veritable mob of people.
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Examples:
“The Roma are often described as an ethnic minority, but many Romani communities view ‘Roma’ as a broad racial identity, stretching all the way back to our Indian ancestry. Indeed, to look at the Roma as one ethnicity is to disregard the veritable mosaic of Romani subgroups. There’s a thread that holds us all together, which to me feels like a string of fairy lights scattered across the world. Each of these lights shines with its own unique beauty.” — Madeline Potter, The Roma: A Traveling History, 2025
Did you know?
Veritable, like its close relative verity (“truth”), came to English through Anglo-French from Latin, ultimately the adjective vērus, meaning “true,” which also gave English verify, aver, and verdict. Veritable is often used as a synonym of genuine or authentic (“a veritable masterpiece”), but it is also frequently used to stress the aptness of a metaphor, often with a humorous tone (“a veritable swarm of lawyers”). In the past, language commentators objected to the latter use, but today it doesn’t draw much criticism.
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muse
Merriam-Webster's Word of the Day for October 18, 2025 is:
muse • \MYOOZ\ • verb
When muse is used to mean "to think about something carefully or thoroughly," it is usually followed by about, on, over, or upon. The word can also mean "to become absorbed in thought," or "to think or say something in a thoughtful way."
// He mused on the possibility of pursuing a master's degree.
// "I could sell the house," she mused aloud, "but then where would I go?"
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Examples:
"On a crisp winter's day, 100-year-old Peg Logan sits in her favorite wingback chair in the living room of her Harpswell home. She flips through the pages of an oversized gardening book and muses about the vegetables she'll plant in the spring." — Connie Sage Conner, The Harpswell (Maine) Anchor, 27 Feb. 2025
Did you know?
Muse on this: the word muse comes from the Anglo-French verb muser, meaning "to gape, to idle, to muse." The image evoked is one of a thinker so absorbed in thought as to be unconsciously open-mouthed. Those who muse on their pets' musings might like to know that muser is ultimately from the Medieval Latin noun musus, meaning "mouth of an animal"—also source of the word muzzle. The noun muse, which in lowercase refers to a source of inspiration and when capitalized to one of the sister goddesses of Greek mythology, has no etymological link: that word comes from the Greek Mousa. The ultimate Greek origin of the word museum translates as "of the Muses."
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kibosh
Merriam-Webster's Word of the Day for October 17, 2025 is:
kibosh • \KYE-bosh\ • noun
Kibosh refers to something that serves as a check or stop. It is usually used in the phrase “put the kibosh on” to mean “to stop or end (something)” or “to prevent (something) from happening or continuing.”
// I downloaded an app to help me put the kibosh on my high screen time.
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Examples:
“… Maybe, suggests [Graham] Dugoni and other advocates, instead of putting the kibosh on devices entirely, we need to treat modern society like a teenager on a rebellious streak. Rather than saying no, we need to show them support, offer a gentle hand, maybe even make them think it’s their idea. In a way, it’s time for some gentle parenting.” — Chase DiBenedetto, Mashable, 3 June 2025
Did you know?
Evidence of kibosh dates the word to only a few years before Charles Dickens used it in an 1836 sketch, but despite kibosh being relatively young its source is elusive. Claims were once made that it was Yiddish, despite the absence of a plausible Yiddish source. Another hypothesis pointed to the Irish term caidhp bhais, literally, “coif (or cap) of death,” explained as headgear a judge put on when pronouncing a death sentence, or as a covering pulled over the face of a corpse when a coffin was closed. But evidence for any metaphorical use of this phrase in Irish is lacking, and kibosh is not recorded in English as spoken in Ireland until decades after Dickens’s use. More recent source theories include a heraldic term for an animal’s head when born with only its face fully showing, and an Arabic word meaning “whip, lash,” but as the note at our etymology explains, no theory has sufficient evidence to back it.
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biannual
Merriam-Webster's Word of the Day for October 16, 2025 is:
biannual • \bye-AN-yuh-wul\ • adjective
Biannual is an adjective used to describe something that happens twice a year, or something that happens every two years. Biannual is always used before the noun it describes.
// The art show is a biannual event that won’t happen again for two more years.
// The group holds biannual meetings in December and July.
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Examples:
“About 200 miles of trails make up The Alabama Coastal Birding Trail along Alabama’s Gulf coast. These comprehensive trails span both Baldwin and Mobile counties, following the coastline, wetlands, and backwaters—all crucial stopover habitats for migratory birds. Visit in the fall or spring to see part of the beautiful biannual journey for yourself.” — Catherine Jessee, Southern Living, 8 Mar. 2025
Did you know?
When we describe something as biannual, we can mean either that it occurs twice a year or that it occurs once every two years. So how does someone know which particular meaning we have in mind? Well, unless we provide them with a contextual clue, they don’t. Some people prefer to use semiannual to refer to something that occurs twice a year, reserving biannual for things that occur once every two years. This practice is hardly universal among English speakers, however, and biannual remains a potentially ambiguous word. Fortunately, English also provides us with biennial, a word that specifically refers to something that occurs every two years or that lasts or continues for two years.
Brasil