weakly and without strength; dispirited or lackluster in energy

pale and powerless; weak and lacking in vitality or substance

physically weak and lacking strength; also describes something that is wishy-washy or lacks forcefulness

willing to help or do something but lacking the necessary ability or resources to accomplish it

unable to turn around a hopeless situation; to fail to save the day despite great effort

a chronic autoimmune neuromuscular disease that causes muscle weakness; myasthenia gravis

To lack the stamina, resources, or support to sustain an effort or follow through to completion; running out of steam.

a feeling of powerlessness or debility; a sense of frustration that arises when one's desires are blocked or when one's talents cannot be fully utilized

to deprive of strength or energy; to weaken or paralyze