quicken Antonyms

reduce speed unman suppress slow sap retard restrain repress reefed quench put-off procrastinate unnerve weaken slack off cause death put the brakes on slow up drag out hold up turn off put back slow down hold off hold back decelerate postpone overlap outstretch disappoint depress demoralize delay defer deaden daunt dampen crush cow check discourage disedge dishearten obstruct kill intimidate inhibit go frustrate enfeeble