adjective
1.
Synonyms: bright 1, beaming, effulgent, fulgent, incandescent, lambent, lucent, luminous, radiant, refulgent
Antonyms: subdued
2.
Synonyms: intelligent 2, brainy, bright, clever, knowing, knowledgeable, quick-witted, ready-witted, sharp, smart
Related Word: erudite, learned; sage, wise