What does muflein mean in Middle English?

There is no word "muflein" in Middle English. It's possible that you've misspelled the word, or that it's a made-up word.

If you can provide more context, such as the source where you encountered the word, I might be able to help you figure out what it could mean.

For example, could it be a variation of:

* "mufle" which refers to a type of soft, thick cloth, often used for wrapping.

* "muffel" which means to wrap or cover something.

* "muffle" which means to deaden or suppress a sound.

Let me know if you can provide more information!