noun, plural et·y·mons, et·y·ma [et-uh-muh] /ˈɛt ə mə/.
the linguistic form from which another form is historically derived, as the Latin cor “heart,” which is the etymon of English cordial, or the Indo-European *ḱ(e)rd-, which is the etymon of Latin cor, Greek kardía, Russian serdtse, and English heart.
Origin of etymon
1560–70; < Latin: the origin of a word < Greek étymon the essential meaning of a word seen in its origin or traced to its grammatical parts (neuter of étymos true, actual, real)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
noun plural -mons or -ma (-mə)
a form of a word or morpheme, usually the earliest recorded form or a reconstructed form, from which another word or morpheme is derived: the etymon of English "ewe" is Indo-European " * owi"
Word Origin for etymon
C16: via Latin, from Greek etumon basic meaning, from etumos true, actual
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
"primitive word," 1570s, from Greek etymon, neuter of etymos "true, real, actual," related to eteos "true," which is perhaps cognate with Sanskrit satyah, Gothic sunjis, Old English soð "true."
Online Etymology Dictionary, © 2010 Douglas Harper