adjective 1.unable to produce an effect:
a disease against which modern medicine is virtually powerless. 2.lacking
power to act; helpless:
His legs crumpled, and he was powerless to rise.
Related forms pow·er·less·ly, adverb
pow·er·less·ness, noun
Synonyms
1. ineffective. 2. feeble, impotent, prostrate, infirm.