de- Hear it!

de- Definition

de- (dē, di, də)

  1. away from, off debar, derail
  2. down degrade, decline
  3. wholly, entirely defunct
  4. reverse the action of; undo defrost, decode

Etymology: L, a prefix signifying separation, cessation, intensification, or contraction; also < Fr dé- (< L de) or OFr des- (< L dis-): see dis-