"Undoubtable" Natural Recordings by Native Speakers
Completely certain or convinced about something; not in doubt or uncertain. Having no room for doubt or uncertainty.
Made unrepaired or unrectified: <br><br>Unfinished or not completed: <br><br>Directly opposite of the past tense of "do" meaning made or repaired.<br><br> Example: Spilled water had left a wine ring on the table, which was still undone even after repeated cleaning.
There is no word "undopplered" in the English language. It is possible that you may be thinking of "underworked."