Answer:

drub

AnswerCrossword Clue
DRUBClobber
DRUBGive a beating
DRUBRout
DRUBBeat decisively
DRUBShellac
DRUBBeat badly
DRUBWallop
DRUBCudgel
DRUBDefeat decisively
DRUBWallop but good
DRUBTrounce
DRUBBeat soundly