powerless
adjective uk/ˈpaʊə.ləs/ us/ˈpaʊ.ɚ/
无力量的；无权力的
having no power
The villagers are powerless against the armed invaders. 村民们在武装侵略者面前毫无抵抗能力。
The police seem to be powerless (= unable) to prevent these attacks. 警方显得无能为力，无法阻止这些袭击。