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retardation

1 ENTRIES FOUND:
retardation /ˌriːˌtɑɚˈdeɪʃən/ noun
retardation
/ˌriːˌtɑɚˈdeɪʃən/
noun
Britannica Dictionary definition of RETARDATION
[noncount]
old-fashioned + usually offensive : an unusual slowness of mental development
formal : an act of slowing down the development or progress of something