| 1 | English | grump | A habitually grumpy or complaining person; A... |
| 2 | English | grum | Morose, stern, surly, sullen; Low, deep in the... |
| 3 | Middle English | grom | Alternative form of grome; boy, valet, servant |
| 4 | Old English | grom | — |
| 5 | Proto-Germanic | gramaz | furious; hostile |
| 6 | Proto-Indo-European | gʰrem- | to be angry; to sound, bellow, growl, roar, be... |
| 7 | Proto-Indo-European | gʰer- | to rub; to stroke; to grind |