decelerate

verb (used with object), de·cel·er·at·ed, de·cel·er·at·ing.

1. to decrease the velocity of: He decelerates the bobsled when he nears a curve.
2. to slow the rate of increase of: efforts to decelerate inflation.

verb (used without object), de·cel·er·at·ed, de·cel·er·at·ing.

3. to slow down: The plane decelerated just before landing.

verb

1. to slow down or cause to slow down

v.

1899, back-formation from deceleration. Related: Decelerated; decelerating.