(uncommon) Immersion.

plural of immergence

(transitive) To plunge into, under, or within anything, especially a fluid; to dip; to immerse. / (intransitive) To disappear by entering into any medium, as a star into the light of the sun.

Third-person singular simple present indicative form of immerge

simple past tense and past participle of immerge

present participle of immerge