Open English Wordnet
Verbs
(v)relax, unbendmake less taut“relax the tension on the rope” (v)loosen, relax, loosebecome loose or looser or less tight“The noose loosened”,
“the rope relaxed” (v)relax, loosen upbecome 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” (v)relax, loosenmake less severe or strict“The government relaxed the curfew after most of the rebels were caught” (v)relax, loosenbecome less severe or strict“The rules relaxed after the new director arrived” (v)slack, slacken, slack up, relaxmake less active or fast“He slackened his pace as he got tired”,
“Don't relax your efforts now”