ĕtymon, i, n., = ἔτυμον,
the origin of a word : etymon habere, to be derived , Varr. R. R. 1, 48, 2: etyma (with origines), Gell. 18, 4, 11 al.
·noun Original or fundamental signification. II. Etymon ·noun An original form; primitive word; roo...
Webster's Dictionary of the English Language