Answer:
here is the answer from the dictionnary
leviathan |ləˈvīəθən|noun(in biblical use) a sea monster, identified in different passages with the whale and the crocodile (e.g., Job 41, Ps. 74:14), and with the Devil (after Isa. 27:1).• a very large aquatic creature, esp. a whale : the great leviathans of the deep.• a thing that is very large or powerful, esp. a ship.• an autocratic monarch or state. [ORIGIN: with allusion to Hobbes' Leviathan(1651).]ORIGIN via late Latin from Hebrew liwyā t ān