New International Version
In that day, the LORD will punish with his sword-- his fierce, great and powerful sword-- Leviathan the gliding serpent, Leviathan the coiling serpent; he will slay the monster of the sea.

American Standard Version
In that day Jehovah with his hard and great and strong sword will punish leviathan the swift serpent, and leviathan the crooked serpent; and he will slay the monster that is in the sea.

Berean Study Bible
In that day the LORD will take His sharp, great, and mighty sword, and bring judgment on Leviathan the fleeing serpent—Leviathan the coiling serpent—and He will slay the dragon of the sea.

Douay-Rheims Bible
IN that day the Lord with his hard, and great, and strong sword shall visit leviathan the bar serpent, and leviathan the crooked serpent, and shall slay the whale that is in the see.

English Revised Version
In that day the LORD with his sore and great and strong sword shall punish leviathan the swift serpent, and leviathan the crooked serpent; and he shall slay the dragon that is in the sea.

King James Bible
In that day the LORD with his sore and great and strong sword shall punish leviathan the piercing serpent, even leviathan that crooked serpent; and he shall slay the dragon that is in the sea.

World English Bible
In that day, Yahweh with his hard and great and strong sword will punish leviathan, the fleeing serpent, and leviathan the twisted serpent; and he will kill the dragon that is in the sea.

Young's Literal Translation
In that day lay a charge doth Jehovah, With his sword -- the sharp, and the great, and the strong, On leviathan -- a fleeing serpent, And on leviathan -- a crooked serpent, And He hath slain the dragon that is in the sea.

Isaiah 27:1 Additional Translations ...