Answer: undid

AnswerCrossword Clue
UNDIDDisconnected
UNDIDOpened.
UNDIDLoosed.
UNDIDBrought to naught.
UNDIDBrought to ruin.
UNDIDAnnulled.
UNDIDNullified.
UNDIDSpoiled.
UNDIDDisengaged
UNDIDDisassembled
UNDIDLoosened a knot
UNDIDLoosened, as a knot
UNDIDOpened, as a necktie
UNDIDDisentangled
UNDIDReversed an action
UNDIDDetached
UNDIDDealt a severe blow
UNDIDCancelled
UNDIDOpened, in a way
UNDIDUnfastened
undidto reverse or annul
undidUNDO, to bring to ruin
undidto unfasten
undidto destroy
UNDIDFixed a word-processing error
UNDIDAnnulled
UNDIDUsed the backspacer
UNDIDCanceled out
UNDIDLoosened
UNDIDTook apart
UNDIDNullified
UNDIDReversed
UNDIDErased
UNDIDOpened
UNDIDVoided
UNDIDReversed the effects of
UNDIDCanceled
UNDIDErased, in a way
UNDIDOpened, as a blouse
UNDIDBrought to naught