unfit vs knock-kneed

unfit and knock-kneed both are adjectives.

Word	Noun	Adjective	Verb	Adverb
unfit	No	Yes	Yes	No
knock-kneed	No	Yes	No	No

unfit (adjective)	knock-kneed (adjective)
not in good physical or mental condition; out of condition	having the knees abnormally close together and the ankles wide apart
below the required standards for a purpose
physically unsound or diseased

unfit (verb)	knock-kneed (verb)
make unfit or unsuitable