immerse

[1]	plunge , plunge , sink , submerge , dip , dunk , duck , inundate
[2]	plunge , steep , engulf , sink , submerge , plunge , engross , bury , absorb , absorb , soak up , engross , engage , occupy , involve
[3]	swallow , swallow up , bury , eat up
[4]	plunge