Here's what it could be, depending on the context:
* "Undo" (ഉണ്ടോ) - This is the interrogative form of "undu" (ഉണ്ട്), which means "there is/are" or "exists". So, "undo" would translate to "is there?" or "are there?"
* "Endo" (എന്തോ) - This word means "something" or "anything". It could be a shortened form of "enthendo" (എന്തെന്തോ), meaning "some things" or "various things". So, "undo" could be a mispronunciation of "endo" and mean "something" or "anything".
Example:
* "Kaffe undo?" (കാഫെ ഉണ്ടോ?) - Is there coffee?
* "Enthendo undo?" (എന്തെന്തോ ഉണ്ടോ?) - Is there anything?
To understand the exact meaning, you need to provide the full phrase or sentence where you encountered "undo".