I. ə-ˈfī-ən(t)s noun
Etymology: Middle English, from Anglo-French, from affier to pledge, trust, from Medieval Latin affidare to pledge, from Latin ad- + Vulgar Latin * fidare to trust — more at fiancé
Date: 14th century
archaic : trust , confidence
II. transitive verb
( -anced ; -anc·ing )
Date: 1555
: to solemnly promise (oneself or another) in marriage : betroth