loosen

verb

1. make loose or looser"loosen the tension on a rope"
2. make less severe or strict"The government relaxed the curfew after most of the rebels were caught"
3. become less severe or strict"The rules relaxed after the new director arrived"
4. disentangle and raise the fibers of"tease wool"
5. cause to become loose"undo the shoelace"
6. make less dense"loosen the soil"
7. become loose or looser or less tight"The noose loosened"