ALERT, quick, quick-witted, bright, clever, perceptive, sharp, sharp-witted, observant, wide awake, on one's toes; informal on the ball, quick on the uptake.
2192; headword
ALERT, quick, quick-witted, bright, clever, perceptive, sharp, sharp-witted, observant, wide awake, on one's toes; informal on the ball, quick on the uptake.
2192; headword
Concise Oxford thesaurus English vocabulary. Краткий оксфордский словарь английского языка тезаурус. 2012