grumbleyoudaoicibaDictYouDict
grumble: see grim
crumble (v.)youdaoicibaDictYouDict
late 15c., kremelen, from Old English *crymelan, presumed frequentative of gecrymman "to break into crumbs," from cruma (see crumb). The -b- is 16c., probably on analogy of French-derived words like humble, where it belongs, or by influence of crumb. Related: Crumbled; crumbling.
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.).
rumble (v.)youdaoicibaDictYouDict
late 14c., "make a deep, heavy, continuous sound," also "move with a rolling, thundering sound," also "create disorder and confusion," probably related to Middle Dutch rommelen "to rumble," Middle High German rummeln, Old Norse rymja "to shout, roar," all of imitative origin. Related: Rumbled; rumbling.
rumble (n.)youdaoicibaDictYouDict
late 14c., from rumble (v.). Slang noun meaning "gang fight" is from 1946. Meaning "backmost part of a carriage" is from 1808 (earlier rumbler, 1801), probably from the effect of sitting over the wheels; hence rumble seat (1828).