undo / undue [ʌnˈdu:]
undo – n. & v. – n. – 1. Computing a function that allows the previous action to be reversed; 2. the key on the keyboard that controls this function; v. tr. – 1. unfasten, untie; 2. restore to original form, annul, cancel; 3. ruin the prospects, reputation or morals of another
undue – adj. – 1. excessive, disproportionate, unwarranted; 2. inappropriate, improper, unjust