Grum is a 4 letter English word. It's valid Scrabble word worth 7 points. It's valid Words with friends word worth 10 points.
You can make 26 anagrams from letters in grum (gmru).
1630-40; probably blend of grim and glum
He was valet-de-chambre, not coachman or grum, and could make nothing of horses.
Troth, we e'en fitted them and clawed 'em off with a vengeance, for all they looked so big and so grum.
A grum, melancholy note came floating over the long sea swells—Oo-oo-oo-ooh!
"He is that," said the grum, patting him on the neck, as though he were special fond on him.
The landlord was a “grum wretch,” with no soul for speculation.
I had the honour of keeping an anchor-watch in company with a grum old Swede, as we lay in the Hudson.
To see him strut and swagger was a sight to make a grum growdy laugh.
So it went on—grumble, grumble, grumble, grum— And that Rachel actually put her arm round his neck and kissed his cross red face.
grum, grum, adj. morose: surly: deep in the throat, as a sound.
True, the manager is dead, and the actors are but bats and lizards, with now and then a grum old owl for prompter.