immersion

nouns

sinking until covered completely with water
immersion, submergence, submerging, submersion
(astronomy) the disappearance of a celestial body prior to an eclipse
immersion, ingress
antonym
emersion
complete attention; intense mental effort
absorption, concentration, engrossment, immersion
is derived from
immerse
a form of baptism in which part or all of a person's body is submerged
immersion
is a type of (narrower)
a Christian sacrament signifying spiritual cleansing and rebirth
"most churches baptize infants but some insist on adult baptism"
baptism
the act of wetting something by submerging it
dousing, ducking, immersion, submersion
is derived from
immerse