βυθίζομαι

Translation: sank into; plunged into; was immersed in (verb)

Etymology: From Ancient Greek βυθός (bythos) meaning 'depth, bottom, abyss'. The same root gives us English words like 'bathyscaphe' (deep-sea vessel) and is related to 'bath'. The -ίζω suffix creates a verb meaning 'to make something go to the depths'.