droop

v. 1 bend or hang down, esp. From weariness; flag. 2 (of the eyes) look downwards. n. 1 drooping attitude. 2 loss of spirit.  droopy adj. [old norse: related to *drop]

v. i. To hang bending downward; to sink or hang down, as an animal, plant, etc., from physical inability or exhaustion, want of nourishment, or the like.