Answer: coarsen

AnswerCrossword Clue
COARSENMake crude.
coarsento make coarse (rough (uneven (not even)))
coarsento make or become coarse
COARSENRough up
COARSENBecome more vulgar
COARSENUse sandpaper
COARSENGet callous
COARSENMake vulgar
COARSENDebase
COARSENMake crude
COARSENMake rougher
COARSENThicken.
COARSENTurn harsh
COARSENBecome rough
COARSENGet tough
COARSENRough up?
COARSENMake rough
COARSENMake harsh
COARSENMake more crude