decompress

(verb) restore to its uncompressed form. Synonyms: uncompress. Examples: "Decompress data."

(verb) decrease the pressure of. Synonyms: depressurize, depressurise. Examples: "Depressurize the cabin in the air plane."

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