retarded

Từ điển American Heritage Dictionary 4th

re·tard·ed (rĭ-tärʹdĭd)adj.
1. Often Offensive. Affected with mental retardation.
2. Occurring or developing later than desired or expected; delayed.

• 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