C3H4U1F4F4
16 points
CHUFF is validvalid
gruff [adj CHUFFER, CHUFFEST] / to chug [v CHUFFED, CHUFFING, CHUFFS]
gruff [adj CHUFFER, CHUFFEST] / to make a series of puffing sounds [v -ED, -ING, -S]
gruff [adj CHUFFER, CHUFFEST] / to chug [v CHUFFED, CHUFFING, CHUFFS]
gruff [adj CHUFFER, CHUFFEST] / to make a series of puffing sounds [v -ED, -ING, -S]