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antonym

/ˈæntənɪm/

A word with the opposite meaning of another

From Greek ant- (opposite).

noun
ant-
Ancient Greek
AI-inferred
ἀντί (antí)
“opposite, against”; the contrasting element
French
Verified
antonyme
A French formation meaning an opposite word; attested in the 1840s

from French antonyme (1840s and 1850s), which was modeled on earlier synonyme and influenced by the etymons of Ancient...

-onym
Ancient Greek
AI-inferred
ὄνυμα (ónuma)
Doric and Aeolic form of ὄνομα (ónoma), “name”
Ancient Greek
AI-inferred
-ώνυμος (-ṓnumos)
“-onymous,” literally involving a name; formed with adjective suffix -ος (-os)
New Latin
AI-inferred
-ōnymum
Scientific combining form used in vocabulary about names and words
Combined
French antonyme
The two elements combine in French, modeled partly on the established pattern of synonyme.
English
AI-inferred
antonym
Naturalized and popularized in English, especially through C. J. Smith’s 1867 book Synonyms and Antonyms
Modern English
antonym
“

A word that sounds as if it has always been sitting in the dictionary is actually a fairly recent invention. French had antonyme by the 1840s, and English settled on antonym in the 1860s, with the Reverend C. J. Smith helping popularize it in his 1867 book Synonyms and Antonyms. Its two Greek pieces are wonderfully literal: anti means “against” or “opposite,” while -onym means “name,” the same naming element found in synonym, pseudonym, eponym, and anonymous. Before antonym caught on, English could use the clunky counterterm—but that rival quietly disappeared, like a runner-up in a vocabulary contest. Remember the image: an antonym is a word whose “name” stands facing another word across an invisible line.

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