retards is a form of:

Retard



noun
1.
(1. A slowing down or hindering of progress; a delay. 2. Music. A slackening of tempo. 3. Offensive Slang. Used as a disparaging term for a mentally retarded person) ផ្អាក, ពន្យា, យឺត
verbpast tense: retarded ; past participle: retarded ; present participle: retarding ;
1.
(TRANSITIVE) (To cause to move or proceed slowly; delay or impede. To be delayed) ផ្អាក, ពន្យា, ធ្វើអោយយឺត retard progress ពន្យឺត, retard a child ធ្វើអោយវិកល​ទាំងប្រាជ្ញាទាំងចិត្ដ
Example: Lack of sun retards plant growth.
2.
(បច្ចេកទេស) ពន្យឹត, ពន្យាការរីកចម្រើន
3.
(វេជ្ជសាស្ត្រ) ពន្យឺតការលូតលាស់
ENGLISH MEANING
verbpast tense: retarded ; past participle: retarded ; present participle: retarding ;
1.
(TRANSITIVE) To keep delaying; to continue to hinder; to prevent from progress; to render more slow in progress; to impede; to hinder; as, to retard the march of an army; to retard the motion of a ship; -- opposed to accelerate.
2.
(TRANSITIVE) To put off; to postpone; as, to retard the attacks of old age; to retard a rupture between nations.
3.
(INTRANSITIVE) To stay back.
1.
delay, detain, hamper, hinder, slow, stay
1.
expedite, hasten, precipitate, quicken
1.
Retardation, delay