unfasten

verb

1. become undone or untied

e.g. The shoelaces unfastened

2. cause to become undone

e.g. unfasten your belt

1. 松开；解开
If you unfasten something that is closed, tied, or held together, or if you unfasten the thing holding it, you loosen or remove the thing holding it.

e.g. When Ted was six we decided that he needed to know how to fasten and unfasten his seat belt...
特德六岁的时候，我们认为他得知道如何系上和解开安全带了。
e.g. Reaching down, he unfastened the latch on the gate...
他伸手打开了门闩。

1. unfasten的反义词

1. 放松：unfashionable 不流行的 | unfasten 放松 | unfastidious 不爱挑剔的

2. 解开：unfamiliarfeature未知要素 | unfasten解开 | unfathomable深不可测的

3. 解开;放松：unfasten 解开 | unfasten 解开;放松 | unfavorable balance of trade 贸易逆差;入超

4. 松开：unfashioned /未成形的/未成形加工的/ | unfasten /松开/ | unfathered /无父母的/庶出的/作者不详的/