Tesauro Inglês
(verbo) 
Definition
to open, unwrap or untie
I managed to undo a corner of the parcel.
Sinônimos
open
He opened his shirt to show me his scar.
,
unfasten
Reaching down, he unfastened the latch on the gate.
,
loose
He loosed his grip on the rifle.
,
loosen
He loosened the scarf around his neck.
,
unlock
She unlocked the case and lifted out the vase.
,
unwrap
,
untie
Nicholas untied the boat from her mooring.
,
disengage
He gently disengaged himself from his sister's tearful embrace.
,
unbutton
,
disentangle
They are looking at ways to disentangle him from this situation.
,
unstrap
,
unclasp
(verbo) 
Definition
to reverse the effects of
It would be difficult to undo the damage that had been done.
Sinônimos
reverse
They have made it clear they will not reverse the decision.
,
cancel
Her insurance had been cancelled by the company.
,
offset
The increase in pay costs was more than offset by higher productivity.
,
wipe out
,
neutralize
antibodies that neutralize the toxic effects of soluble antigens
,
invalidate
An official decree invalidated the vote.
,
annul
The marriage was annulled last month.
,
nullify
He used his broad executive powers to nullify decisions by local government.
(verbo) 
Definition
to cause the downfall of
Our hopes of a victory were undone by an error from the goalkeeper.
Sinônimos
ruin
Roads have been destroyed and crops ruined.
,
defeat
He swore to defeat the plan.
,
destroy
The building was completely destroyed.
,
wreck
Vandals wrecked the garden.
,
shatter
Something like that really shatters your confidence.
, ,
mar
The scar was discreet enough not to mar his good looks.
, ,
overturn
He accused his opponents of wanting to overturn the government.
, ,
subvert
an alleged plot to subvert the state
,
bring to naught

Sinônimos adicionais

in the sense of annul
Definition
to declare (a contract or marriage) invalid
The marriage was annulled last month.
Sinônimos
in the sense of cancel
Her insurance had been cancelled by the company.
in the sense of defeat
Definition
to thwart or frustrate
He swore to defeat the plan.
Sinônimos
put an end to,
put paid to,
bring to ruin

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Video: pronunciation of 'undo'

Fonte

Tesauro para undo do Collins Tesauro Inglês
#moon50
The moon is at the forefront of our minds as we celebrate the 50th anniversary of Neil Armstrong’s ‘small step’ on 20th July, 1969. This month, we’ve been exploring lunar terminology, as well as looking at how the moon has woven itself into the fabric of our everyday language.
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