Flaccid (adjective)

Lacking firmness or stiffness; drooping or sagging.

Origin:

Late 16th century: from latin flaccidus, from flaccus 'limp, drooping', from flere 'to droop'.

Examples:

1. The once sturdy tree had become flaccid and was in danger of falling over.
2. After the workout, his muscles were no longer flaccid but toned and defined.
3. The balloon was flaccid, having lost its air.
4. Her face was flaccid and expressionless as she stared out the window.
5. He was dehydrated and his skin was flaccid and saggy.