How to say "retard" in Japanese

• 遅らせるおくらせるCommon
  ichidan verb, transitive verbCovers 'retard' as a verb meaning to delay, postpone, put off, or slow something's progress, development, or timing — a schedule, a plan, growth. It is the full causative form and the safer default of the two.
  歯医者はいしゃに行いくのをどうして遅おくらせているのか。↗

  Why have you delayed seeing the dentist?
• 遅らすおくらすJLPT N1approx.Common
  godan verb, transitive verbThis is the shortened form of 遅らせる, carrying the same senses — to delay, postpone, slow down, retard — and suiting the same contexts, such as holding up a plan or slowing progress; both are common words.

Both verbs translate 'retard' only in its verb sense of delaying or slowing something; 「遅らせる」 is the full causative form and the default choice, while 「遅らす」 is simply its shortened variant with the same meaning.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• 遅らせるおくらせるto delay
• 遅らすおくらすto delay
• がいじretard
• 池沼ちしょうretard
• 沼ぬまretard