From Longman Dictionary of Contemporary Englishrelax your hold/griprelax your hold/gripa) LOOSEto hold something less tightly than beforerelax your hold/grip on He relaxed his grip on my arm. b) STRICTto become less strict in the way you control somethingrelax your hold/grip on The party has no intention of relaxing its hold on the country. → relax
Examples from the Corpus
relax your hold/grip• Weeping with merriment, gleeful through and through, she never relaxed her grip.• When he tries to say something I relax my grip.• Then with excruciating slowness he relaxed his hold, allowing her to back away a pace.• The pilots cautiously relaxed their grip and let their muscles slacken.• He relaxed his grip on the mug, rolled his sleeves down, pushed his chair back.• Never for one moment does this shimmering, simmering emotional desert storm of a film relax its grip on your senses.• But attitudes of this kind took time to gain the upper hand: the past relaxed its grip only slowly. 