unable to help oneself; weak or dependent

a helpless invalid.

deprived of strength or power; powerless; incapacitated

They were helpless with laughter.

affording no help.

adjective

able , capable , competent , enterprising , independent , resourceful , skilled , strong

adjective

abandoned , basket-case , debilitated , defenseless , dependent , destitute , disabled , exposed , feeble , forlorn , forsaken , friendless , handcuffed , impotent , inefficient , inexpert , infirm , invalid , over a barrel * , paralyzed , pinned , powerless , prostrate , shiftless , tapped , tapped out , unable , unfit , unprotected , up creek without paddle , weak , with hands tied , inadequate , incapable , futile , hopeless , incompetent , ineffective , involuntary , lost , numb , vulnerable