loosen up

(verb) cause to become unblocked. Synonyms: unstuff, loosen up. Example: "The medicine unstuffed my nose in minutes!."

(verb) become less tense, less formal, or less restrained, and assume a friendlier manner. Synonyms: relax, loosen up. Example: "Our new colleague relaxed when he saw that we were a friendly group."

(verb) make one's body limber or suppler by stretching, as if to prepare for strenuous physical activity. Synonyms: limber up, warm up, loosen up.

(verb) become less tense, rest, or take one's ease. Synonyms: relax, loosen up, unbend, unwind, decompress, slow down. Examples: "He relaxed in the hot tub." "Let's all relax after a hard day's work."

(verb) cause to feel relaxed. Synonyms: relax, unstrain, unlax, loosen up, unwind, make relaxed. Example: "A hot bath always relaxes me."