i Register
In some senses, undo is marked as figuratively, colloquial. Watch for register when choosing this word.
ADJ.
considered, done, done, hard, justice, most, social
It's hard to undo the damage once you've said something hurtful to someone.
VERB + UNDO
back, can't, cannot, doesn't, don't, let, power, rope
You can't undo the damage you caused by spreading those rumors about her.
UNDO + NOUN
bootlaces, bra, button, commitment, decades, designation, injustice, knots
She undid her bra and changed into comfortable clothes after a long day at work.
PREP.
until
I tried to undo the changes until I finally got the document back to the original version.
ADV.
already, carefully, fortunately, such
I carefully undid the knot that had been stuck for hours.