cluon
know what's what
be on the ball
know the score
be with it
know what's going on
knowledgeable
abreast
sussed
clueful
gaumish
savvy
sagacious
perspicacious
sapient
informatively
in the know
up on
well-read
know-everything
IQ
know
laanie
hip
knowledgeably
nattily
bel esprit
informedly
informativity
intelligently
informativeness
good-hearted
au fait
know like the back of one's hand
sentient
sophomoric
shrewd
learnedly
smartly
illuminatory
brick
alliteratively
gyani
cognizant
akamai
insiderish
intellectual
quick-sighted
eagle-eyed
instructively