grumbleyoudaoicibaDictYouDict
grumble: see grim
grumble (v.)youdaoicibaDictYouDict
1580s, "complain in a low voice;" 1590s, "make a low, rumbling sound," from Middle French grommeler "mutter between the teeth" or directly from Middle Dutch grommelen "murmur, mutter, grunt," from grommen "to rumble, growl." Imitative, or perhaps akin to grim (adj.). With excrescent -b- as in mumble. Related: Grumbled; grumbling.
grumble (n.)youdaoicibaDictYouDict
1620s, from grumble (v.).
grump (n.)youdaoicibaDictYouDict
"ill-humor," 1727, in humps and grumps "surly remarks," later the grumps "a fit of ill-humor" (1844), then "a person in ill humor" (1900); perhaps an extended sense of grum "morose, surly," which probably is related to Danish grum "cruel;" or perhaps suggested by grumble, grunt, etc.
grumpy (adj.)youdaoicibaDictYouDict
1778, from grump + -y (2). Related: Grumpily; grumpiness. Scottish variant grumphie also was used as a generic name for a pig.