'Crooked' in the Bible

Every valley shall be filled, And every mountain and hill shall be brought low; And the crooked shall become straight, And the rough ways smooth;

And with many other words he testified, and exhorted them, saying, Save yourselves from this crooked generation.

that ye may become blameless and harmless, children of God without blemish in the midst of a crooked and perverse generation, among whom ye are seen as lights in the world,