weakened vs impaired

weakened and impaired both are adjectives.

Word	Noun	Adjective	Verb	Adverb
weakened	No	Yes	No	No
impaired	No	Yes	No	No

weakened (adjective)	impaired (adjective)
damaged; used of inanimate objects or their value	diminished in strength, quality, or utility
reduced in strength	mentally or physically unfit
mixed with water
impaired by diminution
made weak or weaker