What is the Latin word for valiant?

The usual Latin words for “valiant” are animōsus, fortis, ācer; also strēnuus, impavidus, audāx. The right choice depends on the sense; see the distinctions below.

English → Latin

“valiant” in Latin

animōsusspirited; full of air, airy; full of life, alive, living, animated fortisstrong, powerful; firm, resolute, steadfast, stout; courageous, brave ācersharp, sour, bitter, pungent; keen, sharp, acute, sagacious; energetic, active, vigorous strēnuusbrisk, nimble, quick, prompt, active; vigorous, strenuous impavidusfearless, undaunted, intrepid audāxbold, audacious, daring; presumptuous ferōxwild, bold, fierce; defiant, arrogant

The English word valiant itself goes back to Latin valeō.

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

valiant

animosus: fortis: acer: strenuus: impavidus: audax: ferox. SYN. in COURAGEOUS.

Quick answer

What is the Latin word for valiant?: The usual Latin words for “valiant” are animōsus, fortis, ācer; also strēnuus, impavidus, audāx. 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.