The Hebrew arum describes a quality of sharp intelligence or shrewdness that can manifest as either wisdom or cunning. The same word describes the serpent in Eden (Genesis 3:1 β 'more crafty than any of the wild animals') and also the wise person who thinks before acting (Proverbs 12:16, 23; 13:16; 14:8, 15). Context determines whether the connotation is positive (prudent, sensible) or negative (scheming, sly).
The Eden narrative uses arum for the serpent's cunning, playing on its similarity to arummim (naked) used of Adam and Eve. The serpent's cleverness exploited their innocence. In Proverbs, the same quality β redirected toward wisdom β becomes a virtue. This duality reflects the biblical view that human capacities are not inherently good or evil; their moral character depends on their direction. Wisdom submitted to God becomes true arum; wisdom turned against God becomes diabolical cunning.