Fully involve (oneself in something) (7)
I believe the answer is:
immerse
(Other definitions for immerse that I've seen before include "Engross" , "Cover with water, dip into" , "Dip totally into liquid" , "Involve deeply" , "dive" .)
I believe the answer is:
immerse
(Other definitions for immerse that I've seen before include "Engross" , "Cover with water, dip into" , "Dip totally into liquid" , "Involve deeply" , "dive" .)