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Verb: decelerate  dee'se-lu`reyt
  1. Lose velocity; move more slowly
    "The car decelerated"
    - slow, slow down, slow up, retard
     
  2. Reduce the speed of
    "He decelerated the car"
    - slow down

Derived forms: decelerates, decelerating, decelerated

See also: deceleration

Type of: alter, change, decrease, diminish, fall, lessen, modify

Antonym: accelerate