relax - verb

• become less tense, rest, or take one's ease
• make less taut
• become loose or looser or less tight
• cause to feel relaxed
• become less tense, less formal, or less restrained, and assume a friendlier manner
• make less severe or strict
• become less severe or strict
• make less active or fast

relax - thesaurus

decompress   loose   loosen   slack   slacken   unbend   unlax   unstrain   unwind