What is the Latin word for sickly?

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

English → Latin

“sickly” in Latin

morbōsusdiseased, sick, ill valētūdināriussickly, weak, infirm invalidusinfirm, impotent, weak, feeble īnfirmusweak, feeble; unhealthy, infirm, indisposed, sick; inconclusive imbēcillusweak, feeble; cowardly

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

sickly

morbosus: valetudinarius: ad aegrotandum proclivis (only of persons; respecting the latter, ☞ Cic. Tusc., 4, 12, 27, 28): invalidus: infirmus: imbecillus (☞ imbecillis is late): affectus valetudine. (The words are found in this connection and order.) invalidus et aeger: aeger et invalidus: infirmus atque aeger (of persons, also of the body or the health). To have a sickly body, et valetudine et natura esse imbecillum: to be always sickly, semper infirma atque etiam aegra valetudine esse.

Quick answer

What is the Latin word for sickly?: The usual Latin words for “sickly” are morbōsus, valētūdinārius, invalidus; also īnfirmus, imbēcillus. 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.