Baptism where the whole body is submerged (9)
I believe the answer is:
immersion
(Other definitions for immersion that I've seen before include "Baptism; deep involvement" , "Deep absorption (in a subject)" , "dip" , "Deep absorption; baptism" .)
I believe the answer is:
immersion
(Other definitions for immersion that I've seen before include "Baptism; deep involvement" , "Deep absorption (in a subject)" , "dip" , "Deep absorption; baptism" .)