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etymon

/ˈɛt.ɪ.mɒn/ noun

noun Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about etymon at Wordnik → Where our words come from →

  1. A simple form inferred as the common basis from which related words in several languages can be derived by linguistic processes.

Origin

From Ancient Greek ἔτυμον (étumon, “the true sense of a word according to its origin”), from ἔτυμος (étumos, “true, real, actual”).

From Wiktionary, via Kaikki.org (CC BY-SA)