Definition of ef- in English:

ef-

Pronunciation: /ɪf, ɛf/

prefix

Variant spelling of ex-1 assimilated before f (as in efface, effloresce).

Definition of ef- in:

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Word of the day jaunty
Pronunciation: ˈdʒɔːnti
adjective
having a lively, cheerful, and self-confident manner...