From Wiktionary, the free dictionary
From re- + immersion.
reimmersion (usually uncountable, plural reimmersions)
- A second or subsequent immersion.
2009 August 16, Judy Battista, “At First Practice With Eagles, Vick Does More Standing Than Running”, in New York Times[1]:They want to avoid a leg injury that would further slow his reimmersion into the N.F.L.