Definition of infirm:
change, bedfast, imperfect, weak, seedy, sick, feeble, lame, rachitic, precarious, ill, strong, bedrid, light, unsound, unstable, nerveless, tottering, unsteady, delicate, bedridden, weakly, flea-bitten, insecure, unaccented, shaky, woebegone, unsubstantial, frail, fallible, irresolute, insubstantial, puny, unhealthy, sick-abed, debilitated, enfeebled, decrepit, creaky, wonky, debile, washy, sapless, tottery, derelict, wobbly.
- diseased (part of speech: adjective)
irresolute (part of speech: adjective)
- weak (part of speech: adjective)
- feeble (part of speech: adjective)
Knowing that the French meant mischief for a good reason, because one of their arrows, or perhaps a quarrel from a cross- bow, whistled just past my head out there upon the sea, my first thought was to get her away to some place of safety, no easy task seeing that she was infirm with age.- "The Virgin of the Sun", H. R. Haggard.
- "The Anti-Slavery Examiner, Omnibus", American Anti-Slavery Society.
- "The Sequel of Appomattox A Chronicle of the Reunion of the States, Volume 32 In The Chronicles Of America Series", Walter Lynwood Fleming.