Phrasal verbs starting with "double"

To turn around and return along the same route you just came from.

To intensify one's commitment to a course of action or position, especially when under pressure.

A rare or non-standard variant, possibly meaning to share a space or to leave paired with another.

To bend sharply at the waist, usually because of pain, laughter, or a physical blow.

To share a space with someone, to bend in pain or laughter, or to increase something twofold.