Synonyms of slow up

Verb

1. slow, slow down, slow up, slack, slacken, weaken

usage: become slow or slower; "Production slowed"

2. slow, slow down, slow up, decelerate, slow, slow down, slow up, retard

usage: cause to proceed more slowly; "The illness slowed him down"

3. decelerate, slow, slow down, slow up, retard, decrease, diminish, lessen, fall

usage: lose velocity; move more slowly; "The car decelerated"