the.com/undo

means To reverse an action and return something to the state it was in before you touched it.

from From Old English 'undon' — 'un-' (reversal) plus 'don,' the ancestor of 'do.' It's one of the oldest un- verbs in the language, originally meaning to unfasten or loosen something, like untying a knot or opening a door that had been shut — the physical sense came first, the digital rewind button borrowed it centuries later.