powerless

/ˈpaʊ.ər.ləs/
adjective
  1. Without the ability to control or influence a situation or event.
    • She was powerless to stop the argument between her two friends.
    • The villagers felt powerless against the rising floodwaters.
    • Many citizens feel powerless when dealing with large government agencies.
  2. Lacking physical strength or energy; weak.
    • After the long illness, he felt completely powerless and could barely walk.
    • She was so exhausted that her legs felt powerless beneath her.
    • The boxer was powerless after taking a hard hit to the jaw.