■ verb
1》 complain in a bad-tempered way.
2》 make a low rumbling sound.
3》 [usu. as adjective grumbling ] (of an internal organ) give intermittent discomfort.
■ noun
1》 a complaint.
2》 a grumbling sound.
Derivatives
~r noun
grumbling noun
grumblingly adverb
grumbly adjective
Origin
C16: from obs. grumme (prob. of Gmc origin) + -le 4 .