LATIN DICTIONARYLexicon Latīnum
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“betray” in Latin

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

betray
to enemies), prodere, tradere.
Leave in the lurch, destituere.
Reveal, disclose, prodere (as, crimen, vultu, conscios, furem); enuntiare (as, commissa; to one, alicui); deferre aliquid or de aliqua re (as an informer; to one, ad aliquem): proferre (as, secreta animi, consilia). To betray one’s self, se prodere. Your voice betrays you, te voce noscito, te ex voce cognosco.
To be the mark of, esse (with genitive). It betrays a dull brain to, etc., est tardi ingenii (with infinitive).
To lead away, aliquem in or ad aliquam rem inducere, illicere, pellicere.

Quick answer

What is the Latin word for betray?
The usual Latin words for “betray” are prōsum, trādō, dēstituō; also ēnūntiō, prōferō, illiciō. 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.