adj.: nice, sensitive, able to see and describe fine and delicate differences, sagacious, quick, pointed, perspicacious, penetrative, penetrating, acute, keen, incisive, fly, brisk, subtle, shrewd, exquisite
Thesaurus Group
acuminate, cusped alert, wary, alert, alert, have a soft spot for sb., vie, sth, turn sb. round one's finger, sth with indifference, advertent, observant, sth, sensitive, apt, agile, poised, aposematic, watchful sentient
Containing Phrases
unsubtle
piercing
lyncean
penetrating
keen watchfulness
a sharp sense of smell
an incisive mind
scent
sagacious
perceptive
penetration
oversharp
judgematic
sensation acute
acute binocular stereopsis
flair
receptive
an observant man
a brilliant mind
wlth a keen glance
a subtle observer
observant
a fine sense of humour
acute eye
a man of keen observation
quick
a nice ear for sounds
noticing or understanding things quickly or clearly