alertness

deficient in alertness or activity

intelligence as revealed by quickness and alertness of mind

showing mental alertness and calculation and resourcefulness s

a showing mental alertness and calculation and resourcefulness s elegant and stylish s characterized by quickness and ease in learning s improperly forward or bold s painfully severe s quick and brisk s capable of independent and apparently intelligent action

on the lookout for possible danger s (of sleep) easily disturbed s marked by full consciousness or alertness