sinking - a descent as through liquid (especially through water); "they still talk about the sinking of the Titanic"

dip - a brief immersion

astronomy, uranology - the branch of physics that studies celestial bodies and the universe as a whole

disappearance - the event of passing out of sight

eclipse, occultation - one celestial body obscures another

attention - the faculty or power of mental concentration; "keeping track of all the details requires your complete attention"

centering, focus, focusing, focussing, direction - the concentration of attention or energy on something; "the focus of activity shifted to molecular biology"; "he had no direction in his life"

specialism - the concentration of your efforts on a particular field of study or occupation

study - a state of deep mental absorption; "she is in a deep study"

baptism - a Christian sacrament signifying spiritual cleansing and rebirth; "most churches baptize infants but some insist on adult baptism"

trine immersion - baptism by immersion three times (in the names in turn of the Trinity)

wetting - the act of making something wet