Adjective infirm has 4 senses
- bedfast, bedridden, bedrid, infirm, sick-abed - confined to bed (by illness)
Antonym: well (indirect, via ill)
- decrepit, debile, feeble, infirm, sapless, weak, weakly - lacking physical strength or vitality; "a feeble old woman"; "her body looked sapless"
Antonym: robust (indirect, via frail)
- infirm - lacking firmness of will or character or purpose; "infirm of purpose; give me the daggers" - Shakespeare
Antonym: resolute (indirect, via irresolute)
- debilitated, enfeebled, infirm, seedy - weak and feeble; "I'm feeling seedy today"
Antonym: healthy (indirect, via unhealthy)
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