1. (v.) To reduce to an even surface or one approaching evenness; to make flat; to level; to make plane.

2. (v.) To throw down; to bring to the ground; to prostrate; hence, to depress; to deject; to dispirit.

3. (v.) To make vapid or insipid; to render stale.

4. (v.) To lower the pitch of; to cause to sound less sharp; to let fall from the pitch.

5. (v. i.) To become or grow flat, even, depressed dull, vapid, spiritless, or depressed below pitch.

align assimilate to balance beat down bend blow down break break down bring down bulldoze burn down cast down chop down conquer crush cut down dab damp demolish disentangle down drag dress dub equalize equilibrize even extend fell floor flush grade grease ground harmonize harrow homogenize humble knock knock down knock out knock over lay lay down lay flat lay level lay low lay out level lubricate make uniform master mow mow down normalize oil override plane planish plaster press out prostrate pull down put down put straight quell rase raze rectify reduce regularize regulate ride down roll roll flat set straight shave sit up smash smooth smooth down smooth out smoothen stabilize stand up standardize steamroll steamroller stereotype straighten straighten out straighten up subdue subjugate suppress symmetrize take down tear down throw down trample down trample underfoot tread underfoot unbend uncurl uniformize unkink unsnarl vanquish