powerless Definition

powerless
adj

1. Deprived of power or authority.

Thesaurus: impotent, ineffectual, weak, vulnerable, feeble, defenceless, frail, debilitated, dependent, disabled, incapable, infirm, prostrate, unarmed, subject; Antonym: commanding, potent.
2. Completely unable (usually to do something)

Example: I was powerless to help.

Derivative: powerlessly
adverb

Derivative: powerlessness
noun