The act of submerging, or the state of being submerged; immersion(noun)
See submersion (mathematics)(noun)
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Use "submersion" in a sentence
"Bleaching, warping, and cortical flaking suggested long-term submersion in water."
"Normally, you need some pretty hefty (and expensive) equipment for this kind of submersion cooking, but Viestad reasoned that the water from his kitchen tap was hot enough to do the job."
"According to Uniden's manual, the phone is JIS7 compliant in terms of water submersion, meaning it can remain underwater at a depth of 3 feet for up to 30 minutes with no damage or loss of function."