intelligent

similar words: clever especially BrE/smart especially AmE good at learning or understanding things quickly
 

bright intelligent - used especially about young people
 

brilliant a brilliant scientist, writer, student, historian etc is extremely intelligent and does very good work
 

brainy informal very intelligent and good at studying 
 

gifted a gifted child is extremely intelligent
 

wise a wise person has a lot of experience and knowledge, and can give good advice
 

cunning/crafty good at using your intelligence to trick people
 

intelligent people: genius someone who is extremely intelligent and has great ideas
 

intellectual someone who is well-educated and interested in art, science, or literature at a high level
 

intelligentsia a country's intellectuals, considered as a single group