Answer: flattening

AnswerCrossword Clue
FLATTENINGEvening out
flatteningLower (a note) in pitch by a half step
flatteningMake or become flat or flatter
flatteningPress (oneself or one's body) against a surface, typically to get away from something or to let someone pass
flatteningDefeat (someone) completely, esp. in a sports contest
flatteningRaze (a building or settlement) to the ground
flatteningKnock someone down with power and vigor
flatteningFLATTEN, to make flat (having a smooth level surface)