at home with

acquainted aware conversant

savvy versant

abreast apprised au courant au fait cognizant conscious grounded in on in the know informed introduced kept posted mindful no stranger to plugged in tuned-in up up on versed in well up in with it

ignorant

aloof cold cool distant foreign new reserved strange unacquainted unapproachable uncommon undistinguished unfamiliar unfriendly unknowledgeable unknown unremarkable

acclimated accustomed common commonplace customary everyday knowing known old hat ordinary plain recognizable routine well-known

savvy versed

abreast acquainted apprised au courant au fait aware cognizant conscious conversant grounded in on in the know informed introduced kept posted mindful no stranger to plugged in tuned-in up up on versed in well up in with it