Dishwasher sound (4)
I believe the answer is:
whir
(Other definitions for whir that I've seen before include "Soft swishing sound" , "Spin with a humming sound" , "Prolonged buzz" , "Rotate with hum" , "Make a humming noise" .)
I believe the answer is:
whir
(Other definitions for whir that I've seen before include "Soft swishing sound" , "Spin with a humming sound" , "Prolonged buzz" , "Rotate with hum" , "Make a humming noise" .)