aware
acquainted, alive to, appreciative, apprised, attentive, au courant, clued-up (informal) cognizant, conscious, conversant, enlightened, familiar, hip (slang) informed, in the picture, keeping one's finger on the pulse, knowing, knowledgeable, mindful, sensible, sentient, wise (slang)
Antonyms
ignorant, insensible, oblivious, unaware, unfamiliar with, unknowledgeable