helpless

1. ADJ If you are helpless, you do not have the strength or power to do anything useful or to control or protect yourself. 无能为力的

Parents often feel helpless, knowing that all the hugs in the world won't stop the tears. 家长们常常感到无能为力，知道世上所有的拥抱也不能止住眼泪。

2. helplesslyADV 无能为力地

Their son watched helplessly as they vanished beneath the waves. 他们的儿子无能为力地看着他们消失在海浪之下。