sapless vs weakly

sapless and weakly both are adjectives.

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

As adjectives, sapless and weakly are synonyms defined as:

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

sapless (adjective)	weakly (adjective)
lacking bodily or muscular strength or vitality	lacking bodily or muscular strength or vitality
destitute of sap and other vital juices; dry

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