n. 无力, 虚弱, 无效, 阳萎

[医] 阳萎, 无能力

Impotence \Im"po*tence\, Impotency \Im"po*ten*cy\, n. [L.
impotenia inability, poverty, lack of moderation. See
{Impotent}.]
1. The quality or condition of being impotent; lack of
strength or power, animal, intellectual, or moral;
weakness; feebleness; inability; imbecility.

Some were poor by impotency of nature; as young
fatherless children, old decrepit persons, idiots,
and cripples. --Hayward.

O, impotence of mind in body strong! --Milton.

2. Lack of self-restraint or self-control. [R.] --Milton.

3. (Law & Med.) Lack of procreative power; inability to
copulate, or beget children; also, sometimes, sterility;
barrenness; specifically, in males: the inability to
achieve or sustain a penile erection; erectile
dysfunction.
[1913 Webster +PJC]