
1) Annul 2) Back up PC command 3) Backtracking computer command 4) Backup software option 5) Backwards-arrow command 6) Bring down 7) Bring ruin to 8) Bring to naught 9) Bring to nought 10) Bring to ruin 11) Cancel 12) Cancel or reverse an action 13) Cancel out 14) Cancel, on a PC 15) Cause the downfall of
Found on
https://www.crosswordclues.com/clue/undo

1) Annul 2) Cancel 3) Cut 4) Destroy 5) Divide 6) Erase 7) Loosen 8) Negate 9) Open 10) Overturn 11) Repeal 12) Reverse 13) Ruin 14) Unbelt 15) Unbrace 16) Unbraid 17) Unbuckle 18) Unbutton 19) Unclip 20) Unfasten 21) Unhitch 22) Unknot 23) Unlace 24) Unlock 25) Unmake 26) Unpick 27) Unpin 28) Unplug
Found on
https://www.crosswordclues.com/clue/undo

Latin, meaning: to surge, wave, undulate / to flood.
Found on
http://archives.nd.edu/uuu.htm

Undo is a command in many computer programs. It erases the last change done to the document reverting it to an older state. In some more advanced programs such as graphic processing, undo will negate the last command done to the file being edited. The opposite of undo is redo. The redo command reverses the undo or advances the buffer to a more cur...
Found on
http://en.wikipedia.org/wiki/Undo

• (v. t.) To reverse, as what has been done; to annul; to bring to naught. • (v. t.) To loose; to open; to take to piece; to unfasten; to untie; hence, to unravel; to solve; as, to undo a knot; to undo a puzzling question; to undo a riddle. • (v. t.) To bring to poverty; to impoverish; to ruin, as in reputation, morals, hopes, or the...
Found on
http://thinkexist.com/dictionary/meaning/undo/

A command in some computer software that reverses the last command entered.
Found on
http://www.encyclo.co.uk/local/20447

Cancels the results of the last operation.
Found on
http://www.traditionalmusic.co.uk/music%20tech%20glossary/Music%20Tech%20Gl

[
v] - cause the ruin or downfall of 2. [v] - cancel, annul, or reverse an action or its effect
Found on
http://www.webdictionary.co.uk/definition.php?query=undo

Sometimes, actions need to be undone. Should you play a few cards but realize along the way that your melds would not meet the requirements for the first meld, for example, you can use the undo button to pick all cards back up and try a different approach.
Found on
https://www.canasta-palace.com/canasta-glossary/

to reverse the doing of; cause to be as if never done: Murder once done can never be undone. · to do away with; erase; efface: to undo the havoc done by the storm. · to bring to ruin or disaster; destroy: In the end his lies undid him. · to unfasten by releasing: to undo a gate; to undo a button. · to untie or loose (a knot, rope...
Found on
https://www.infoplease.com/dictionary/undo

Use this button in the playing field to revoke as many moves as you want, one move at a time. But careful; each use generates minus points!
Found on
https://www.spider-palace.com/spider-glossary/
No exact match found.