(adjective) : in-firmus, a, um (post-class. infir-mis, e, Amm. 20, 6)
* Not strong, weak, feeble.
* Lit.: viribus infirmis,Cic. Verr. 2, 4, 43, § 95: valetudo,id. Brut. 48, 180: classis inops et infirma,Cic. Verr. 2, 5, 33, § 86: valetudo infirmissima,id. de Or. 1, 45. —Hence, infirm, indisposed, sick: sum admodum infirmus,Cic. Ac. 1, 4, 14; Plin. Ep. 7, 26: pecus,i. e. sheep,Ov. Ib. 44: lumen solis,weak, feeble,Luc. 5, 545: infirmior est panis ex polline,less nourishing,Cels. 2, 18: infirmissimus cibarius panis,id. ib.: saporis vinum,Col. 3, 7: infirmissimae arbores,Plin. 17, 24, 37, § 217: nervi,weak,id. 23, 2, 28, § 59: civitas exigua et infirma,Caes. B. G. 7, 17.—With ad: infirmi ad resistendum,Caes. B. C. 3, 9, 3: infirmior ad haec omnia,Plin. 36, 20, 37, § 145.—With adversus: fama, infirmissimum adversus viros fortes telum,Curt. 4, 14.— In neutr. pl. subst.: infirma, ōrum, the weak parts: lineae,Plin. 9, 43, 67, § 145.
* Trop., weak in mind or character, superstitious, pusillanimous, inconstant, light-minded: tenuis atque infirmi haec animi videri,Caes. B. C. 1, 32: quippe minuti Semper et infirmi est animi voluptas ultio,Juv. 13, 190: sum paulo infirmior,Hor. S. 1, 9, 71: quorum concursu terrentur infirmiores,Caes. B. C. 1, 3, 5: homines infirmissimi,very uncertain, not to be depended on,Col. 3, 10, 6.—Of things, of no weight or consequence, weak, trivial, inconclusive: omnino ad probandum utraque res infirma et nugatoria est,Cic. Caecin. 23, 64: quod apud omnes leve et infirmum est,id. Rosc. Com. 2, 6: cautiones,id. Fam. 7, 18: infirmiore vinculo (amicitiae) contrahi,Liv. 7, 30, 2. —Hence, advv.
* Form infirmē.
* Weakly, faintly, not strongly, not very: infirme animatus,Cic. Fam. 15, 1, 3. — Of speech, feebly, without vigor of expression: jejune et infirme,Plin. Ep. 1, 20, 21.
* Form infirmĭter, weakly, feebly, without energy: infirmiter invalideque dicere,Arn. 7, 250.

s. TLL