tato nivṛttaḥ krīḍiṣyan
vārdhiṁ matta iva dvipaḥ
tataḥ—then; nivṛttaḥ—returned; krīḍiṣyan—for the sake of sport; gambhīram—deep; bhīma-nisvanam—making a terrible sound; vijagāhe—dived; mahā-sattvaḥ—the mighty being; vārdhim—in the ocean; mattaḥ—in wrath; iva—like; dvipaḥ—an elephant.
After returning from the heavenly kingdom, the mighty demon, who was like an elephant in wrath, for the sake of sport dived into the deep ocean, which was roaring terribly.
Link to this page: https://prabhupadabooks.com/sb/3/17/24