de·cel·er·ate

de·cel·er·ate
dēˈseləˌrāt/Submit
verb
3rd person present: decelerates
(of a vehicle, machine, or process) reduce speed; slow down. "international growth rates decelerated in the early 1970s" synonyms: slow down, slow up, ease up, slack up, reduce speed, brake
"decelerate when approaching the curve" cause to move more slowly.
"gravity decelerates the cosmic expansion"