The word part "ef-" is a prefix that means "out of, from".

ef- is a borrowing from Latin. Etymons: Latin ef-. See etymology Nearby entries Browse more nearby entries

The word part "ef-" is a prefix that means "thoroughly".

Alternative form of ex- (combining with f-initial words). Derived terms.

Definitions (Senses and Subsenses). 1. Prefix occurring only in words adopted from Latin or Old French, e.g. ef-fect, ef-ficient, ef-flūence, ef-fūsiǒun.

noun ˈef : the letter f Word History First Known Use before the 12th century, in the meaning defined above.

Ef- definition: variant of ex-1 (by assimilation) before f. See examples of EF- used in a sentence.

EF in British English abbreviation for. Enhanced Fujita (scale) Select the synonym for:

From Proto-Germanic *jabai, originally the dative of *jabą (“doubt”), whence ef (“doubt”).

ef-, prefix. ef- is a form of ex- attached to roots beginning with f: efficient.