Correct spelling, explanation: both disenroll and unenroll are used to describe the process of removing oneself or another person from a particular program, course, membership, or organization. The choice between disenroll and unenroll may depend on the context and the preferred terminology used by the specific institution or region. The prefix dis- in disenroll indicates a reversal or negation of enrollment. This term is more commonly used in some contexts, particularly in academic settings or formal institutions.

Definition of disenroll:
verb, to remove someone’s name or your own name from a list
I decided to disenroll from the course because of scheduling conflicts
After failing to meet the academic requirements, the university was forced to disenroll the student from the program.

Collocations with disenroll:
Some most commonly used collocations include:
1. Disenroll from: to officially remove oneself or be removed from a program, course, or institution
She decided to disenroll from the course due to scheduling conflicts.
2. Disenroll a student: to officially remove a student from a program, course, or institution
The school may disenroll a student who consistently violates the code of conduct.
3. Disenroll a participant: refers to the act of officially removing someone from a program, event, or organization
The organization reserves the right to disenroll any participant who fails to comply with the rules.
4. Disenroll in a program/course/class: to withdraw oneself from a specific educational program, course, or class
He chose to disenroll in the advanced math class to focus on other subjects.

Correct spelling, explanation: in many cases, the choice between disenroll and unenroll is a matter of personal preference or institutional convention. Both terms are widely understood and convey the same meaning. The prefix un- in unenroll signifies the opposite or reversal of enrollment. This term is also commonly used and is generally considered synonymous with disenroll. As both terms are correct and convey the same idea, you can choose the one that aligns with your writing style or follows the regional conventions. The key is to be consistent in your writing.