■□ Ephesians 4:5 “immersion”, i.e. “engross”, “embroil”, “engulf”, “absorb”, “wrap oneself into/with something”, that's has a recipient of what one is being immersed into, [a recipient of such an action] e.g. waters, a TV Show, etc. -- Cp. Matthew 28:19; Mark 16:16; Ephesians 4:5, i.e. get into it (embroil / absorb yourself into): The Word, The Faith, The Scriptures, The Father, The Son, Etc.
There may be a relation to baths ("waters") for Acts 2:38; See Matthew 3:11, “…He will Immerse you in The Spirit of Holiness, and in The Fire.”; Mark 1:8, “I immerse you in the waters, but, He will immerse you in The Spirit of Holiness!”; Luke 3:16, “John answered and said unto them, “Behold, I Immerse you in the waters, but, He who comes after me, that One who is mightier than me, that One whom I’m not worthy that I should loosen the leather straps of His sandals, He will Immerse you in The Spirit of Holiness, and in The Fire!”; Acts 1:5, “that, John had Immersed in water, and you will be Immersed in The Spirit of Holiness, after not many days.” – (Re-Iterated in Acts 11:16.)