Etymon

eft-mon, n.; E. pi. -mons, -monz, Gr. pi. -MA, -mi. An original form; primitive word; root. — EtymoFogy, -jT, n. That part of philology which explains the origin and derivation of words; that part of grammar relating to changes in the forms of words.— Et'ymolog'ical, -loj'ik-al, a. Pert, to etymology.— Etymologist, -list, n. One versed in, etc.