adjective
unable to effect one's purpose, intention, or end
powerless to leave
Synonyms: helpless, impotent
Related Word: inactive, inert, passive, supine; decrepit, feeble, infirm, weak; incapable, incompetent, ineffective, unfit
Contrasted words: effective, effectual, efficient; able, capable, competent; potent, puissant
Antonyms: powerful