Dictionary entry

Eu

Webster's Dictionary 1913

‖Eu (?). [Gr. � well, orig. neut. of � good; prob. connected with Skr. su, from the same root as E. is; or with Skr. vasu good, prob. fr. the same root as E. was.] A prefix used frequently in composition, signifying well, good, advantageous; — the opposite of dys-.