retard

Từ điển American Heritage Dictionary 4th

I. re·tard¹ (rĭ-tärdʹ)v. re·tard·ed, re·tard·ing, re·tardsv. tr.
To cause to move or proceed slowly; delay or impede.v. intr.
To be delayed.n.
1. A slowing down or hindering of progress; a delay.
2. Music. A slackening of tempo. [Middle English retarden, from Old French retarder, from Latin retardāre: re-, re- + tardāre, to delay (from tardus, slow).] re·tardʹer n. II. re·tard² (rēʹtärd')n. Offensive Slang
1. Used as a disparaging term for a mentally retarded person.
2. A person considered to be foolish or socially inept. [Short for retarded.]

• Từ đồng nghĩa / Synonyms:
  idiot, imbecile, cretin, moron, changeling, half-wit, decelerate, slow, slow down, slow up, check, delay
• Từ trái nghĩa / Antonyms:
  accelerate, speed up, speed, quicken