relax

transitive verb

1. to make looser, or less firm or tense: to relax one's grip
2. to make less strict or severe; soften: to relax discipline
3. to abate; reduce; slacken: to relax one's efforts
4. to release from intense concentration, hard work, worry, etc.; give rest to: to relax the mind
5. to treat (tightly curled hair) with a chemical solution so as to loosen the curls

intransitive verb

1. to become looser or less firm, as the muscles
2. to become less tense or stern, as one's features
3. to become less strict, or milder, as discipline
4. to become easier, or less stiff, in manner
5. to rest from effort, worry, or work, as by lying down, engaging in recreation, etc.