What is the Latin word for confirm?

The usual Latin words for “confirm” are sanciō, efficiō, cōnfirmō; also argūmentum, probō, comprobō. The right choice depends on the sense; see the distinctions below.

English → Latin

“confirm” in Latin

sanciōto render, make or appoint as sacred or inviolable by a religious act, sanctify (make holy); to devote, consecrate, dedi efficiōto make out or work out; effect, execute, complete, accomplish, make, form, compose; to cause to occur, to bring about, cōnfirmōto make firm, establish, re-establish, strengthen, fortify, mature, confirm; to encourage, animate, embolden; persuade; argūmentumargument (as in an argument for a position); evidence, a proof; a point, a theme; a topic, thesis probōto approve, permit, commend; to test, to inspect; to examine comprobōto approve wholly of something; to assent to, sanction, or acknowledge; to prove, establish, attest, make good, show, co stabiliōto make firm, confirm, stay, support, hold still, stabilize; to establish, fix, make secure, confirm fundōto pour out, shed; to melt, cast, found, make by smelting; to overthrow, overcome, rout, vanquish an enemy, rout, scatte auguraugur (priest, diviner, or soothsayer, one who foretold the future in part by interpreting the song and flight of birds)pangōto fasten, fix, set, especially drive, sink, force in; to set, plant; to celebrate, tell of, record, compose accounts of

The English word confirm itself goes back to Latin firmus, through confirmo.

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

confirm

make or declare valid, sancire (e.g., augurem, the choice of an augur; pactum, legem, etc.): alicujus rei auctorem fieri (to approve of and receive: e.g., of a law, legis; said of the Senate): ratum facere or efficere: ratum esse jubere (to declare something that has taken place, valid, etc.) :

Strengthen by arguments or witnesses, confirmare, with or without rationibus or argumentis: probare: comprobare (to declare to others as true, valid or fit): by anything, aliqua re: by examples, exemplis comprobare: firmare, affirmare: confirmare (to confirm the truth of anything): fidem alicui rei addere (to add confirmation or faith to anything): to confirm the truth of a saying, that etc., facere, ut vere dictum videatur, etc. (Vid: Nep., Attic., 11, 6): the result, the issue of the matter has confirmed it, exitus docuit: to confirm by one’s testimony, testimonio confirmare: to confirm by one’s oath, jurejurando obstringere (to asseverate with an oath, Tac., Ann., 4, 31, 3): to confirm by oath, jurejurando firmare, sancire: to be confirmed, probari; comprobari.

To make firm; establish, stabilire (to give duration or stability; e.g., to liberty, government, etc.): fundare (to found; e.g., the security of the state, one’s power, etc.).

As religious action to confirm young Christians, *adolescentes utriusque sexus doctrinam Christianam professos coram omnibus commendare Deo: ☞ sacris Christianis initiare is (according to the adopted idiom) our baptizing.

Quick answer

What is the Latin word for confirm?: The usual Latin words for “confirm” are sanciō, efficiō, cōnfirmō; also argūmentum, probō, comprobō. 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.