undoes; undid /-ˈdɪd/ ; /ˌʌnˈdɪd/; undone /-ˈdʌn/ ; /ˌʌnˈdʌn/ ; undoing undoes; undid /-ˈdɪd/ ; /ˌʌnˈdɪd/; undone /-ˈdʌn/ ; /ˌʌnˈdʌn/ ; undoing Learner's definition of UNDO
[+ object]
1
: to open or release (something) : to unfasten or loosen (something)打开;解开;拆开 -
undo a belt/button/zipper解开皮带/纽扣/拉链
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She undid [=unbuttoned] her blouse.她解开衬衫的纽扣。
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I can't undo [=untie] this knot.我解不开这个结。
2
: to change or stop the effect of (something) : reverse改变;清除;撤销 -
You can't undo the past.你无法改变过去。
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The damage cannot be undone.损失无法挽回。
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(computers) Will the program let me undo a change if I make a mistake?如果我弄错了,这个程序能否让我撤销更改?
3
formal : to cause the failure of (someone or something)打败;毁掉