grumble

Main Entry: grum·ble 

Pronunciation: \ˈgrəm-bəl\

Function: verb

Inflected Form(s): grum·bled; grum·bling \-b(ə-)liŋ\

Etymology: probably from Middle French grommeler, ultimately from Middle Dutch grommen; akin to Old High German grimm grim

Date: 1580

intransitive verb 

1 : to mutter in discontent
2 : growl, rumble

transitive verb : to express with grumbling

— grumble noun

— grum·bler \-b(ə-)lər\ noun

— grum·bling·ly \-b(ə-)liŋ-lē\ adverb

— grum·bly \-b(ə-)lē\ adjective