quick at learning and understanding things

bright, ingenious

having a good knowledge of

experienced, familiar with

(of a person) well-educated and with many cultural interests

well-bred, experienced

having, showing, great learning

well-educated, cultured

having, showing intelligence

very smart

having, showing that one knows something

experienced, aware

able to read and write; having read and learned much

able to read and write

giving care and thought to something

attentive, aware

showing that one has understood or noticed

alert, sensitive

deep (the usual word); showing, having great knowledge

intellectual, thoughtful

able, skilful

able, skilful

understanding and acting quickly

very smart

wise

smart, judicious

(of) a wise and experienced man; a plant with dull greyish-green leaves, used as a herb

wise

skilled or experienced in something

experienced, informed

having a mind full of ideas, information, as the result of reading much

knowing much from reading

having or showing experience, knowledge, good judgement etc

intelligent, reasonable