retardation

re·tar·da·tion
UK: /ɹɪtɑːdˈe‍ɪʃən/   US: /ɹitɑɹˈdeɪʃən/
nafnorð
  • seinkun
  • tálmun
  • þroskahefting

Samheiti: backwardness, deceleration, lag, mental retardation, retardant, retardent, slowdown, slowing, slowness, subnormality

Andheiti: acceleration