Invalide.
1. Lacking strength; SYN. nerveless.
2. Pathetically lacking in force or effectiveness; SYN. lame.
ETYM French impotent Latin impotens -entis; pref. im- not + potens potent powerful. Related to Potent.
1. Lacking power or ability.
2. (Of a male) Unable to copulate.
Weak; powerless; sexually incapable.
ETYM Latin infertilis: cf. French infertile. Related to In- not, and Fertile.
Incapable of reproducing; SYN. unfertile.