Impuissant

im·pu·is·sance  (m-py-sns, m-pwsns)

n.

Lack of power or effectiveness; weakness.

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[Middle English impuissaunce, from Old French impuissance : in-, not; see in-¹ + puissance, power; see puissance.]

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im·puis·sant adj.

Thesaurus

Adj.

1.

impuissant - lacking physical strength or vigor impotent - lacking power or ability; "Technology without morality is barbarous; morality without technology is impotent"- Freeman J.Dyson; "felt impotent rage"