Prompt a roommate to buy earplugs, perhaps (5)

I believe the answer is:

snore

(Other definitions for snore that I've seen before include "Noise made while asleep" , "Sound made by sleeper" , "Make raucous nasal sound during sleep" , "thing which bores" , "Make racous nocturnal sound" .)

I've seen this clue in The Washington Post.

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