transitive verb immersed -·mersed′, immersing -·mers′·ing

1. to plunge, drop, or dip into or as if into a liquid, esp. so as to cover completely
2. to baptize by submerging in water
3. to absorb deeply; engross immersed in study

Etymology: < L immersus, pp. of immergere, to dip, plunge into: see in- & merge