weakly vs infirm

weakly and infirm both are adjectives.

Word	Noun	Adjective	Verb	Adverb
weakly	No	Yes	No	Yes
infirm	No	Yes	No	No

As adjectives, weakly and infirm are synonyms defined as:

Other synonyms of weakly include debile, decrepit, feeble, rickety, sapless, weak.

weakly (adjective)	infirm (adjective)
lacking bodily or muscular strength or vitality	lacking bodily or muscular strength or vitality
	lacking firmness of will or character or purpose

weakly (adverb)	infirm (adverb)
in a weak or feeble manner or to a minor degree