Learn how to say Impotence correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word impotent:
1unable to take effective action; helpless or powerless:
he was seized with an impotent anger
2(of a man) abnormally unable to achieve an erection or orgasm:
he was on medication which had made him impotent
(of a male animal) unable to copulate.
late Middle English: via Old French from Latin impotent- ‘powerless’, from in- ‘not’ + potent- (see potent1)