This adjective describes what is twisted or tortuous, used both literally and figuratively. In Deuteronomy 32, it characterizes a generation that is morally crooked and perverse, the opposite of God's straightness. The image is visceral—something bent out of true shape, refusing the straightforward path. It's a favorite term in wisdom literature for moral deviance, capturing not just wrongdoing but a fundamental distortion of what should be upright.