■ verb rɪ'tα:d delay or hold back in terms of development or progress.
■ noun 'ri:tα:d offensive a person who has a mental disability (often used as a general term of abuse).
Derivatives
~ation noun
~er noun
Origin
C15 (earlier (ME) as ~ation ): from Fr. ~er , from L. ~are , from re- 'back' + tardus 'slow'.