Noah Webster's Dictionary (a.) Critically discerning; shrewd; sagacious; subtle; crafty.

Multi-Version Concordance Astute (2 Occurrences) 2 Samuel 22:27 With the pure you will show yourself pure. With the crooked you will show yourself shrewd. (See NAS) Psalms 18:26 With the pure, you will show yourself pure. With the crooked you will show yourself shrewd. (See NAS)