decelerate
verb
[ diːˈsɛləreɪt ]
• reduce or cause to reduce in speed.
• "the train began to decelerate"
Similar:
slow down,
slow up,
slow,
go slower,
ease up,
slack up,
reduce speed,
lessen one's speed,
brake,
put the brakes on,
hit the brakes,
slam on the anchors,
Origin:
late 19th century: from de- (expressing removal) + a shortened form of accelerate.