trample

from The American Heritage® Dictionary of the English Language, 5th Edition.

• intransitive verb To beat down with the feet so as to crush, bruise, or destroy; tramp on.
• intransitive verb To treat harshly or ruthlessly.
• intransitive verb To tread heavily or destructively.
• intransitive verb To inflict injury as if by treading heavily.
• noun The action or sound of trampling.

from The Century Dictionary.

• noun A frequent heavy or rough tread; a trampling.
• To beat or tread down by the tramping or stamping of feet, or by frequent treading; prostrate or crush by treading under foot; tread upon or tread down, literally or figuratively.
• To tread with repeated force and shock; stamp; hence, to tramp roughshod; tread roughly or contemptuously.

from the GNU version of the Collaborative International Dictionary of English.

• transitive verb To tread under foot; to tread down; to prostrate by treading.
• transitive verb Fig.: To treat with contempt and insult.
• intransitive verb To tread with force and rapidity; to stamp.
• intransitive verb To tread in contempt; -- with on or upon.
• noun The act of treading under foot; also, the sound produced by trampling.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• verb transitive To crush and destroy something by walking on it.
• verb by extension To treat someone harshly.
• verb intransitive To walk heavily and destructively.
• verb by extension To cause emotional injury as if by trampling.
• noun the sound of heavy footsteps

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• verb walk on and flatten
• verb tread or stomp heavily or roughly
• verb injure by trampling or as if by trampling
• noun the sound of heavy treading or stomping