If something is compartmentalized, it has been divided into separate areas, groups, or “boxes,” so the pieces do not mix. You can do this with a real space (a bag with pockets, a report in sections, a company split into teams) and, very often, with the mind: a person compartmentalizes work and home, or grief and daily life, so one part does not spill into the other. The verb is compartmentalize; this -ed form is what you meet most, as an adjective or as “has been divided.” It sounds a little formal — managers, teachers, and psychologists like it; friends might just say keep them separate. Though actually, people also use it about a person who can shut one feeling away. That can be a useful skill, and it can also mean they will not let two truths sit together.

區隔開的、分門別類的；也常說心理區隔