Main entry: unbend, loosen up, decompress, unwind, relax, slow down
Definition: become less tense, rest, or take one's ease
Usage: He relaxed in the hot tub; Let's all relax after a hard day's work
Main entry: slow down, decelerate
Definition: reduce the speed of
Usage: He slowed down the car
Antonyms: accelerate, speed, speed up
Definition: cause to move faster
Main entry: retard, slow, slow down, slow up, decelerate
Definition: lose velocity; move more slowly
Usage: The car decelerated
Antonyms: speed, speed up, accelerate, quicken
Definition: move faster