impotent

Lacking physical strength or vigor; weak.

Lacking in power, as to act effectively; helpless.

Incapable of sexual intercourse because of an inability to achieve or sustain an erection.

Lacking self-restraint.

Not potent; lacking power, strength, or vigor, physical, intellectual, or moral; powerless; weak; feeble.

Wholly lacking in sexual power: said of the male, and rarely of the female.

Lacking the power of self-restraint; destitute of self-command; ungovernable.

One who is feeble, infirm, or languishing under disease.

A male without sexual power.

One who is impotent.