Is "unenroll" a proper word

Yes, unenroll is a proper and increasingly common word meaning to withdraw enrollment from a program, course, institution, or service. It's the logical opposite of "enroll," formed by adding the prefix "un-" (meaning reversal or removal). While not found in all traditional dictionaries, it's widely used in educational administration, healthcare (particularly Medicare/Medicaid), and software subscriptions. The term appears in official government documentation, academic policies, and professional communications, establishing its legitimacy through functional usage.

Alternative terms include withdraw (more formal), drop (informal for courses), deregister, or cancel enrollment. Some style guides prefer these established alternatives over the newer "unenroll," arguing it's unnecessary jargon. However, "unenroll" offers precision that general terms lack—it specifically means reversing enrollment rather than just leaving or withdrawing generally. In technical contexts like student information systems or subscription management platforms, "unenroll" functions as standard terminology. As language evolves through actual use, words like "unenroll" become proper through widespread adoption in professional contexts, regardless of dictionary inclusion speed.