|Origin:||, past participle of immergere, from mergere; MERGE|
to put someone or something deep into a liquid so that they are completely covered
immerse somebody/something in something
Immerse your foot in ice cold water to reduce the swelling.
to become completely involved in an activity:
He left school at 16 and immersed himself in the Labour party.
She was far too immersed in her studies.