LATIN DICTIONARYLexicon Latīnum
English → Latin

“affiance” in Latin

The English word affiance itself goes back to Latin fīdō, through affīdāre.

Riddle & Arnold A Copious and Critical English–Latin Lexicon, 1864

affiance
fiducia (the proper word): fides (belief in a man’s honesty): spes firma or certa (confident expectation). To have affiance in anything or anybody, fidere, confidere alicui rei or alicui: fretum esse aliqua re or aliquo (to build on anything): fiduciam habere alicujus rei (to rely confidently on anything).
Marriage contract, sponsalia.
affiance v.
spondere, despondere (alicui aliquam: desponsare, late): destinare alicui (jam destinata erat egregio juveni, Plin.) is post-Augustan in the sense of despondere alicui. To affiance one’s self to anybody, despondere sibi aliquam (of the man); alicui desponderi (of the woman).
Affianced, eponsus; to anybody, sponsa, desponsa alicui (of the woman).

Quick answer

What is the Latin word for affiance?
The usual Latin words for “affiance” are fīdūcia, fidēs, certus; also spōnsālis, fīdō, spondeō. The right choice depends on the sense; see the distinctions below.

Entry from J. E. Riddle & T. K. Arnold, A Copious and Critical English–Latin Lexicon (rev. C. Anthon, New York: Harper, 1864), digitised by Fergus J. P. Walsh, CC BY-SA 4.0; Latin markup adapted by latindictionary.co.