LATIN DICTIONARYLexicon Latīnum
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“commit” in Latin

The English word commit itself goes back to Latin mittō, through committō.

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

commit
to intrust, committere (to leave it to a person, imposing on him a moral responsibility): permittere (to leave a thing quite to another): mandare. demandare (to commit to be kept or performed): deponere aliquid apud aliquem (to give anything to anybody to be kept safe): credere (e.g., occulta sua alicui credere): to commit (as it were, ) one’s self to anybody’s protection, se permittere, committere, tradere in alicujus fidem: to commit to memory, mandare memoriae aliquid.
To imprison, comprehendere (to arrest): in custodiam dare, in vincula conjicere (put into custody):
To be guilty of: facere: committere: admittere: in se admittere (the latter implying more of moral guilt): suscipere in se: patrare: perpetrare. To commit a crime, admittere scelus, maleficium, dedecus, flagitium. flagitium committere (Cic.) facinus in se admittere (Caes.); a foul crime, foedum facinus in se consciscere (Liv.): a theft, furtum facere: a murder, caedem facere (Cic.), edere, perpetrare (Liv.): a fault or blunder, errare; in errore versari; errore capi or duci in errorem induci (not, errorem committere): ridiculous faults, *labi in joculares errores (Ruhnken): to commit a breach of faith, perfidiosum esse: fidem violare or frangere: adultery, adulterium committere: what fault has he committed? quid designavit? (comedy) OBSERVE, “To commit” is often best translated by agere with a suitable adverb: to commit a folly, stulte agere: to commit an act of imprudence, imprudenter, or temere et imprudenter agere.

Quick answer

What is the Latin word for commit?
The usual Latin words for “commit” are committō, permittō, mandō; also dēmandō, crēdō, comprehendō. 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.