Adam Clarke's Commentary on the Bible

Verse 17 (Proverbs 14:17)

He that is soon angry - אפים קצר ketsar appayim , "short of nostrils:" because, when a man is angry, his nose is contracted, and drawn up towards his eyes.

Dealeth foolishly - He has no time for reflection; he is hurried on by his passions, speaks like a fool, and acts like a madman.

- Adam Clarke's Commentary on the Bible