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TOEFL IELTS BNC: 6417 COCA: 6632

undo

Word family
Related topics: Computers
ldoce_346_gun·do /ʌnˈduː/ ●●○ verb (past tensepst undid /-ˈdɪd/, past participlepp undone /-ˈdʌn/, third person singular3rd undoes /-ˈdʌz/) [transitiveT]
1 FASTEN1#TIE#to open something that is tied, fastened, or wrapped 解開,打開,鬆開〔某物〕
The screws can be undone by hand.
這些螺絲可以用手擰開。
I undid the package carefully.
我小心地打開包裹。
undo your jacket/shirt/bra etc 解開你的夾克/襯衫/胸罩等
He undid his coat.
他解開外套。
see thesaurus at open5  See picture of unzip 拉開拉鏈, loosen 鬆開〔領帶〕, unbutton 解開紐扣, untie 解開〔鞋帶〕
2 IMPROVEto try to remove the bad effects of something you have done 消除的壞影響
We cannot undo the damage of a lifetime in only 30 days.
我們不能在短短的 30 天内消除影響一生的傷害。
If a medicine is taken again too soon, it may undo all the good that has been done.
如果服用一種藥物時間間隔過短,可能會抵消所有已産生的藥效。
3. technical to remove the effect of your previous action on a computer 撤銷〔先前的計算機指令〕
Examples from the Corpus
un·do verb
Syllable
Corpus

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