Definition of unretarded in English:

unretarded

adjective

  • Not retarded; especially not delayed or impeded in progress.

Origin

Early 17th century; earliest use found in Thomas Adams (1583–1652), Church of England clergyman. From un- + retard + -ed.

Pronunciation

unretarded

/(ˌ)ʌnrɪˈtɑːdɪd/