לִוְיָתָן (livyâthânliv-yaw-thawn'noun|masculineserpent)
[Heb] לִוְיָתָן ETCBC: לִוְיָתָן‎ (subs|leviathan) OSHL: l.au.ad TWOT: 1089b GK: H4293 Greek: δράκων, κῆτος, μέγας
Derivation: from לָוָה;
Strong's: a wreathed animal, i.e. a serpent (especially the crocodile or some other large sea-monster); figuratively, the constellation of the dragon; also as a symbol of Babylon
KJV: leviathan, mourning.