[im.merse] vt im.mersed ; im.mers.ing [ME, fr. L immersus, pp. of immergere, fr. in- + mergere to merge] (15c) 1: to plunge into something that surrounds or covers; esp: to plunge or dip into a fluid
2: engross, absorb "completely immersed in his work"
3: to baptize by immersion