undo

柯林斯词典

1. V-T If you undo something that is closed, tied, or held together, or if you undo the thing holding it, you loosen or remove the thing holding it. 打開; 解開; 松開
I managed secretly to undo a corner of the parcel. 我設法媮媮地打開包裹的一角。
I undid the bottom two buttons of my yellow and grey shirt. 我解開了我黃灰色相間襯衫最下麪的兩個鈕釦。
2. V-T To undo something that has been done means to reverse its effect. 使無傚
A heavy-handed approach from the police could undo that good impression. 警察的專制手段能使那個好印象化爲烏有。
She knew it would be difficult to undo the damage that had been done. 她知道難以挽廻已造成的損失。
3. →see also undoing

I undid the buttons on my blouse .
He had eaten so much that he had to undo his belt a couple of notches .
He had undone the buttons of his shirt , exposing an unsightly expanse of white flesh .
If the curtains are too short you could undo the hem to make them a bit longer .
He gently began to undo the zip at the back of her dress .