drones is a form of:

Drone



noun
1.
(a male honeybee, an idler, a deep humming sound, an idle parasite or loafer) honeybee drone ឃ្មុំឈ្មោល, He's a drone មនុស្សរស់ដោយសារគេ
2.
(A droning sound, a deep, humming sound, the largest pipe of the bagpipes) សូររហ៊ឹមៗ
Example: Make a droning, Drones do no work, The airplanes droned overhead, A few students fell asleep as the speaker droned on.
verb
1.
(INTRANSITIVE) (to make a continuous humming sound, to talk in a monotonous way) ច្រៀងរហ៊ឹមៗ
2.
(INTRANSITIVE) ក្រេបលំអង