'Crooked' in the Bible

Every ravine shall be filled up, and every mountain and hill levelled down, the crooked places shall be turned into straight roads, and the rugged ways into smooth;

And with many more appeals he solemnly warned and entreated them, saying, "Escape from this crooked generation."

so that you may always prove yourselves to be blameless and spotless--irreproachable children of God in the midst of a crooked and perverse generation, among whom you are seen as heavenly lights in the world,