Intelligent (5)

(Other definitions for alert that I've seen before include "sharp-witted" , "Vigilant - warning" , "Vigilant, watchful" , "Danger warning" , "Prompt" .)

(Other definitions for witty that I've seen before include "Showing quick verbal humour" , "Cleverly funny" , "Clever and funny" , "Sparkling" , "Amusing, droll" .)

(Other definitions for astute that I've seen before include "Clever and canny" , "Shrewd and sagacious" , "Shrewd, wily" , "Sharp-witted" , "Able to make accurate assessments" .)

(Other definitions for clever that I've seen before include "Smar and canny" , "Quick at learning, bright" , "Mentally or physically skilful" , "Cute" , "Quick at learning and understanding" .)

(Other definitions for brainy that I've seen before include "Intelligent, clever." , "Having a high IQ" , "Highly intelligent" , "Binary (anag.)" , "Bright" .)

(Other definitions for bright that I've seen before include "Intelligent; vivid" , "Illuminated" , "Intelligent; well-lit" , "Effulgent" , "Intelligent, lively" .)

(Other definitions for able that I've seen before include "- -bodied; - seaman" , "Showing skill" , "Proficient; skilful" , "In a position or competent to" , "Fit as a seaman" .)

(Other definitions for learned that I've seen before include "Erudite - academic" , "Acquired and digested knowledge" , "Picked up - well-read" , "Educated, scholarly" , "Got to know" .)