retarded

About 5.70 uses per million words.

Meaning

1. adjective Delayed; delayed in development, hindered; impeded. .mw-parser-output .defdate{font-size:smaller}

   This kind of plant is usually of a retarded growth.

2. adjective Having mental retardation; mentally deficient or underdeveloped.
3. adjective Specifically, having an IQ below 70.
4. adjective Extremely stupid; obtuse
5. adjective Designating a parameter of an electromagnetic field which is adjusted to account for the finite speed of radiation.
6. verb simple past and past participle of retard

Similar words

delayed feebleminded half-witted simple-minded dim-witted cretinous simple backward slow tardy

Often followed by

children by the and child in persons or individuals