loosens
v.
解开( loosen的第三人称单数 );
放松;
松弛;
（使）放松;
例句:
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With a wrench he loosens the nuts which fuse the fuel line between tank and engine.
他用钳子扭松了接连油箱与发动机的油管上的螺钉帽.
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This connection has a right - hand thread ( loosens counterclockwise ).
这种接头有右手螺纹 ( 逆时针方向松开 ).
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She loosens the ropes around her wrists and jumps into the water.
她弄松了手腕上环绕的绳子,跳入了水中.
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But halfway through Ms. Blume's book the thread loosens.
来自WSJ
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Water...loosens the cohesion of a steep bank.
来自A. Geikie
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If the caramel becomes too stiff to work, return it to the heat until it loosens.
来自BBC