What is the meaning of lesson word part mis?

The word part "mis-" is a prefix that means wrong, bad, or improper. It's often used to create words that indicate something is done incorrectly or is of poor quality.

Here are some examples:

* Misunderstand: To understand something incorrectly.

* Misspell: To spell a word incorrectly.

* Misbehave: To behave badly.

* Misplace: To put something in the wrong place.

* Misfortune: Bad luck.

So, in the context of "lesson," the word "mislesson" would imply teaching something incorrectly or teaching something that is harmful or inappropriate.