S: (v) relax, loosen up (become less tense, less formal, or less restrained, and assume a friendlier manner) "our new colleague relaxed when he saw that we were a friendly group"
S: (v) relax, loosen (make less severe or strict) "The government relaxed the curfew after most of the rebels were caught"
S: (v) relax, loosen (become less severe or strict) "The rules relaxed after the new director arrived"
S: (v) slack, slacken, slack up, relax (make less active or fast) "He slackened his pace as he got tired"; "Don't relax your efforts now"