unfertile vs impotent

unfertile and impotent both are adjectives.

Word	Noun	Adjective	Verb	Adverb
unfertile	No	Yes	No	No
impotent	No	Yes	No	No

unfertile (adjective)	impotent (adjective)
incapable of reproducing	lacking power or ability
	(of a male) unable to copulate