"to make naked," early 14c., from naked, perhaps with misapprehension of the -d as a past tense suffix. Marked as "Obs[olete] exc[ept] Sc[ottish]" in OED. Earlier was naken "to strip naked" (mid-13c.); a later generation coined nakedize (1858).
The inseparable Thingumy and Bob speak an argot of spoonerisms (“nake no totice” and so on), and carry a secret ruby.