How do you spell widdle?

"Widdle" is not a standard English word. It is a common mispronunciation of "whistle" by young children.

However, if you're talking about something else entirely, please give me more context. For example:

* Are you looking for a word that sounds similar to "widdle"?

* Are you trying to spell a specific term related to a certain field?

Providing more information will help me understand what you're looking for and give you the correct spelling.