infirmity infirmative • infirmly · · · Info · Definitions · Synonyms · Characters · · infirmity · · Text Latin · · Script 9 · · Length Definitions · · · (noun) the state of being weak in health or body (especially from old age). Synonyms: frailty, debility, feebleness, frailness, valetudinarianism. · · Noun Definition 1 Synonyms · · · frailty · · Synonym 1 debility · · Synonym 2 feebleness · · Synonym 3 frailness · · Synonym 4 valetudinarianism · · Synonym 5 Characters · · f latin small letter f U+0066 i latin small letter i U+0069 m latin small letter m U+006D n latin small letter n U+006E r latin small letter r U+0072 t latin small letter t U+0074 y latin small letter y U+0079