Word Study
undoing |
undomestic |
undomesticate |
undomesticated |
undone |
undouble
| undoubtable
| undoubted
| undoubtedly
| undoubting
| undrained
undouble
CIDE DICTIONARY
undouble, v. t. [1st pref. un- + double.].
To unfold, or render single. [1913 Webster]
For further exploring for "undouble" in Webster Dictionary Online
(NT only) to listen to the NET Bible 
