LATIN DICTIONARYLexicon Latīnum
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“luck” in Latin

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

luck
casus; fortuna. Good luck, prospera, or secunda, fortuna: bad luck, infortunium; adversus casus: good luck to you! bene vertat! quod approbet deus or approbent dii! hanc rem tibi volo bene et feliciter evenire! I do not envy you your luck, haud invideo tibi: to congratulate one on his good luck, congratulationem facere, congratulatione fungi; gratulari; on anything, alicui aliquid or de re (e.g., alicujus adventum or alicui de adventu): to wish one good luck, optimis ominibus [☞ not votis] aliquem prosequi (to follow with good vishes): cupere ut res bene eveniat (to wish that a thing may turn out well).

Quick answer

What is the Latin word for luck?
The usual Latin words for “luck” are cāsus, fortūna, prosperō; also secundus, īnfortūnium. 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.