etymon

noun
et·​y·​mon | \ ˈe-tə-ˌmän How to pronounce etymon (audio) \
plural etyma\ ˈe-​tə-​mə How to pronounce etyma (audio) \ also etymons

Definition of etymon

1a : an earlier form of a word in the same language or an ancestral language
b : a word in a foreign language that is the source of a particular loanword
2 : a word or morpheme from which words are formed by composition or derivation

First Known Use of etymon

1573, in the meaning defined at sense 1a

History and Etymology for etymon

Latin, from Greek, literal meaning of a word according to its origin, from etymos true; akin to Greek eteos true — more at sooth

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