NASB 1995
He who restrains his words has knowledge, And he who has a cool spirit is a man of understanding.

American Standard Version
He that spareth his words hath knowledge; And he that is of a cool spirit is a man of understanding.

Berean Study Bible
A man of knowledge restrains his words, and a man of understanding maintains a calm spirit.

Douay-Rheims Bible
He that setteth bounds to his words. is knowing and wise: and the man of understanding is of a precious spirit.

English Revised Version
He that spareth his words hath knowledge: and he that is of a cool spirit is a man of understanding.

King James Bible
He that hath knowledge spareth his words: and a man of understanding is of an excellent spirit.

World English Bible
He who spares his words has knowledge. He who is even tempered is a man of understanding.

Young's Literal Translation
One acquainted with knowledge is sparing his words, And the cool of temper is a man of understanding.

Proverbs 17:27 Additional Translations ...