- to unfold; render single.
Origin of undouble
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for undouble
His gum boots screeched, the bench creaked as he began to undouble himself.First Fam'lies of the Sierras
To undouble him, that he might fit into a coffin, they had been forced to lug him to a fire and thaw him out a bit.