retard

1 retard /rɪˈtɑɚd/ verb
retards; retarded; retarding
1 retard
/rɪˈtɑɚd/
verb
retards; retarded; retarding
Britannica Dictionary definition of RETARD
[+ object] formal
: to slow down the development or progress of (something)
2 retard /ˈriːˌtɑɚd/ noun
plural retards
2 retard
/ˈriːˌtɑɚd/
noun
plural retards
Britannica Dictionary definition of RETARD
[count] informal + offensive
1 
: a person who has slow mental development
2 
: a stupid or foolish person