slow down

verb

1. 1

   become less tense, rest, or take one's ease

   He relaxed in the hot tub

   Let's all relax after a hard day's work

2. 2

   reduce the speed of

   He slowed down the car

3. 3

   lose velocity; move more slowly

   The car decelerated

4. 4

   become slow or slower

   Production slowed

5. 5

   cause to proceed more slowly

   The illness slowed him down