Knock-kneed
Part of speech: adjective
Definition: (of the legs) having the knees abnormally close together, and the ankles spread apart
Unfit
Part of speech: adjective
Definition: Not fit; not having the correct requirements.Not fit, not having a good physical demeanor.
Part of speech: verb
Definition: To make unfit; to render unsuitable, spoil, disqualify.
Example sentence: From the very first, it has been the educated and intelligent of the Negro people that have led and elevated the mass, and the sole obstacles that nullified and retarded their efforts were slavery and race prejudice; for what is slavery but the legalized survival of the unfit and the nullification of the work of natural internal leadership?