grum /grum/

1. Morose
2. Surly
3. (of a sound) deep in the throat (obsolete)

• backstroke
• backstrokes
• backswimmer
• backswimmers
• backswing
• backswings
• backsword
• backswordman
• backswordmen
• backswords
• back talk
• back time
• back-to-back
• back to basics
• back to earth
• back to front
• back to nature
• back-to-nature
• back to square one
• backtrack
• backtracked
• backtracking
• backtrackings
• backtracks
• back translation