(~es, ~ing, undid, ~ne)
1.
If you ~ something that is closed, tied, or held together, or if you ~ the thing holding it, you loosen or remove the thing holding it.
I managed secretly to ~ a corner of the parcel...
Some clamps that had held the device together came ~ne.
VERB: V n, V-ed
2.
To ~ something that has been done means to reverse its effect.
She knew it would be difficult to ~ the damage that had been done...
If Michael won, he would ~ everything I have fought for.
VERB: V n, V n
3.
see also ~ing , ~ne