Same word as versant:
abreast, acquainted, apprised, at home with, au courant, au fait, aware, cognizant, conscious, conversant, grounded, in on, in the know, informed, introduced, kept posted, mindful, no stranger to, plugged in, savvy, tuned in, up on, up, versed, versed in, well up in, with it
abreast, acquainted, apprised, at home with, au courant, au fait, aware, cognizant, conscious, conversant, grounded, in on, in the know, informed, introduced, kept posted, mindful, no stranger to, plugged in, savvy, tuned in, up on, up, versed, versed in, well up in, with it