Half-dead is an idiom used to describe something or someone that is weak, struggling, or barely alive. Synonyms of this expression include debilitated, enervated, weakened, anemic, frail, feeble, exhausted or depleted. Alternatively, other phrases that convey a similar meaning are run-down, on the brink, on the ropes, fading away, or at death's door. It can also be used to describe feelings such as being overwhelmed, demotivated, or lacking energy. Regardless of the severity or context, these synonyms can be applied to describe a state of physical, mental, or emotional depletion.