Are yams and sweet potatoes the same?
1590s, from French infertile (late 15c.), from Late Latin infertilis "unfruitful," from in- "not, opposite of" (see in- (1)) + fertilis (see fertile).
infertile in·fer·tile (ĭn-fûr'tl)adj. Incapable of producing offspring; sterile.
Not capable of reproducing.
Not capable of developing into a complete organism, as infertile eggs.
Relating to soil or land that is not capable of supporting or is unfavorable to the growth of plants.