put (sth) deep under water
cause (oneself) to enter deeply into an activity
"Immerse yourself in hot water"
"He immersed himself into his studies"
"The huge waves swallowed the small boat and it sank shortly thereafter"
"The professor plunged his students into the study of the Italian text"
Some buffaloes were bathing, immersed so deeply that only their heads were visible above water.
出自： R. P. Jhabvala
A traveller immersed to the waist in the jaws of a fissure.