acquainting, familiarizing, initiating, introducing, orientating, orienting
habituating, wontingapprising, briefing, clueing (in)(or cluing (in)), filling in, informingeducating, enlightening, grounding, instructing, schooling, training, versingexposing, presenting, subjectingadvising, telling, tipping (off), warning, wising (up)reacquainting