What is the Latin word for weakly?

The usual Latin words for “weakly” are īnfirmus, imbēcillus, parum; also invalidus, Arnŏbĭus. The right choice depends on the sense; see the distinctions below.

English → Latin

“weakly” in Latin

īnfirmusweak, feeble; unhealthy, infirm, indisposed, sick; inconclusive imbēcillusweak, feeble; cowardly parumvery little; insufficient, not enough, too little invalidusinfirm, impotent, weak, feeble ArnŏbĭusAn African Church father in the time of Diocletian

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

weakly

infirme: imbecillius: minus or parum valide (invalide, Arnobius). Usually by circumlocution with adjective.

Quick answer

What is the Latin word for weakly?: The usual Latin words for “weakly” are īnfirmus, imbēcillus, parum; also invalidus, Arnŏbĭus. 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.