Apeirastos means untempted, incapable of being tempted by evil, or having no experience of temptation to evil. Composed of the privative a- and peirazō (to tempt/test), it describes God's absolute moral perfection and untainted holiness. Found once in James 1:13.
James 1:13 makes a foundational theological statement: God cannot be tempted by evil. This is not a limitation but a declaration of God's absolute holiness. When people claim God is "testing" them with evil, they misunderstand God's nature. Evil is entirely foreign to God's character. Every enticement to sin comes from human desire, not from God — who is the giver of every good and perfect gift.