unfastened
v.
解开（尤指衣服或带子）( unfasten的过去式和过去分词 );
松开;
解开，脱开，松开;
例句:
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He once emerged from the toilets with his flies unfastened.
有一次他裤链没拉就出了厕所。
来自柯林斯例句
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The buttons came unfastened.
扣子松开了.
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He unfastened the door in the ivy - laced wall, and waited.
他把那扇开在爬满长春藤的墙壁上的门打开, 等候着.
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He quickly unfastened his eagle-buckled belt and let his jeans drop.
来自NEWYORKER
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The guards unfastened his cuffs, then left Bout and me alone.
来自NEWYORKER
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He wore a loosely made camel's-hair overcoat, the unfastened belt of which trailed behind him.
来自A. Powell