Heb. pool. So a great caldron is called, because it sends forth a great smoke, as a pool doth vapours; as in like manner the great brazen laver in the temple is called a sea, for the great quantity of water which it held.
Related Commentaries of Job 41:20
Job 41:20
20 Out of his nostrils goeth smoke, as out of a seething pot or caldron.