retard

Synonyms: arrest back off baffle balk bog bog down brake bring to screeching halt check choke choke off clog close off crimp dawdle decelerate decrease defer delay detain down encumber falter fetter flag hamper handicap hang up hesitate hold back hold up impede lessen let up loaf loiter mire poke postpone reduce retardate set back shut down shut off slacken slow down slow up stall take down

Antonyms: advance help push