English → Latin
“infirm” in Latin
imbēcillusweak, feeble; cowardlyīnfirmusweak, feeble; unhealthy, infirm, indisposed, sick; inconclusivedēbilisweak, frail, feeble; lame, disabled, crippled, infirm, debilitatedincōnstānschangeable; inconstant; inconsistent; fickle; capriciouslevislight, not heavy; easy to digest; quick, swift, fleet, nimble, rapid
The English word infirm itself goes back to Latin firmus, through infirmus.
Riddle & Arnold A Copious and Critical English–Latin Lexicon, 1864
infirm
Weak, imbecillus (deficient in strength; ☞ imbecillis is a later form): infirmus (having no firmness or duration): debilis (useless, from some defect).
Unsteady in purpose, inconstans: levis: in consiliis capiendis mobilis.
Quick answer
- What is the Latin word for infirm?
- The usual Latin words for “infirm” are imbēcillus, īnfirmus, dēbilis; also incōnstāns, levis. 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.