learned

Synonyms: abstruse academic accomplished bookish brainy conversant cultivated cultured deep educated erudite esoteric experienced expert grave grounded highbrow intellectual in the know judicious lettered literary literate omniscient pansophic pedantic philosophic philosophical polymath posted professorial recondite sage sapient scholarly scientific sharp skilled solemn solid sound studied studious versed well-educated wellgrounded well-read well-rounded

Antonyms: ignorant stupid uninformed