unable to look after yourself or to do anything to help yourself:
He began to feel depressed and helpless.
a vicious attack on a helpless victim
Newman threw out a hand in a helpless gesture.
unable to control a strong feeling that you have
He was near to death, and I was helpless with fear.
helpless laughter/rage/tears etc
We both collapsed into helpless giggles.
—helplessness noun [uncountable]