helpless
adjective uk/ˈhelp.ləs/ us/ˈhelp.ləs/
C1 无助的，无奈的
unable to do anything to help yourself or anyone else
a helpless two-day-old baby 一个无助的只有两天大的婴儿
You feel so helpless because there's nothing you can do to make the child better. 你觉得如此无助是因为你没有办法让那个孩子病情好转。
The government is helpless (to act) against these crooks. 政府无法对这些骗子采取行动。