loosen up Definition

loosen
verb loosened, loosening

tr & intr
1. To make or become loose or looser.

Thesaurus: slacken, relax, unravel, separate, detach, set free, let go, let out, liberate, untie, slacken, unfasten.
2. To untie.
3. To free; to cause to become free or freer.

Example: Drink always loosened his tongue

Derivative: loosening
noun

Etymology: 14c.

Phrasal Verb: loosen up

To make or become less dense, stiff or compacted.
Example: loosened up the soil
To relax or become more relaxed.