undiaper means to remove the diaper from. Lexicurio rates it Sui generis — a strength score of 87 out of 100.
Etymology
From un- + diaper.
verb
- To remove the diaper from.“Tourists are particularly fascinated by the latest in Chinese childwear, pants which are purposely split in the rear, revealing bare buttocks and permitting “instant relief" without the inconvenience of undressing or undiapering the child.”