up on

Synonyms and related words:

abreast of, acquainted with, adept in, at home in, at home with, au courant, briefed, conversant with, educated, enlightened, expert at, familiar with, good at, handy at, informed, informed in, instructed, intimate with, master of, posted, primed, proficient in, schooled, skilled in, strong in, taught, trained, up-to-date, versed, versed in, well up on, well-read in, well-versed