Nullify (4 letters)

{ Answer }

UNDO

{ Related Clues }

Annul
Cancel
Destroy
Efface
Open
Reverse
Ruin
Bring to naught
Bring to ruin
Cancel, on a PC
Edit command
Loosen a knot
Menu choice
Menu option
Reverse an act
Strike down
Take apart
Take back
Word processing command
Word processor command

{ Tags }

annul, apart, back, bring, cancel, command, computer, destroy, edit, knot, loosen, menu, nullify, open, option, processor, reverse, ruin, take, undo, word

{ Notes }

The answer UNDO is seen frequently, appearing about once every 80 puzzles.

{ Definition }

UNDO as a verb:

1. cancel, annul, or reverse an action or its effect; "I wish I could undo my actions"

2. (unmake, undo) = deprive of certain characteristics

3. cause the ruin or downfall of; "A single mistake undid the President and he had to resign"

4. (untie, undo, loosen) = cause to become loose; "undo the shoelace"; "untie the knot"; "loosen the necktie"

5. (unwrap, undo) = remove the outer cover or wrapping of; "Let's unwrap the gifts!"; "undo the parcel"