LATIN DICTIONARYLexicon Latīnum
English → Latin

“vain” in Latin

The English word vain itself goes back to Latin vānus.

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

vain
Useless; to no purpose, vanus: inutilis; cassus: irritus.
Frivolous, trifling, worthless, inanis, vanus, futilis (good for nothing): fragilis, caducus. (The words are found in this connection and order.) fragilis caducusque, fluxus atque fragilis (transitory). Vain endeavors, thoughts, contentiones, cogitationes inanes: vain pleasures, laetitiae futiles: human affairs are vain, res humanae fragiles caducaeque sunt: everything earthly is vain and transitory, infra lunam nihil est nisi mortale et caducum; breves et mutabiles rerum vices sunt.
Conceited, Vid:
Attached to vain things, vanus: inanis. To be vain, *vanarum rerum or vano glorioiae honorisque studio trahi.

Quick answer

What is the Latin word for vain?
The usual Latin words for “vain” are vānus, inūtilis, cāsus; also irritus, inānis, fūtilis. 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.