drooping is a form of:

Droop



noun
1.
(A drooping) ការធ្លាក់ចុះ
Example: Flowers droop when they need water, the boy's head drooped drowsily, a droop in a hem; a droop of the head.
verb
1.
(INTRANSITIVE) (to bend or hang downward through tiredness or weakness, to lose vitality, to become dejected) flowers droop ទ្រោម, ស្វិត, droop with exhaustion ទន់ដៃទន់ជើង (ដោយអស់កម្លាំង)
2.
(TRANSITIVE) (to let hang down, to lower) ធ្វើអោយធ្លាក់សំយុងចុះ