The Collaborative International Dictionary
Undouble
Undouble \Un*dou"ble\, v. t. [1st pref. un- + double.] To unfold, or render single.
Wiktionary
undouble
vb. To unfold, or render single.
Usage examples of "undouble".
To show him I can take a joke too, I give him a kick in the belly, and when he could git his breath again, and undouble hisself, I throwed the saddle on him.
A declaration can be rather more freely doubled when a single trick undoubled will take the dealer out, but even in this position the player must be cautious of informing the dealer that there is a strong hand against him.
By and by I wondered if Jill were dead too, so I undoubled my neck a little and found some air.