'Fēn bié' literally combines 'fēn' (to divide, separate) and 'bié' (to part, to depart), together expressing the act of separating or parting—especially with emotional weight. It often implies a meaningful, sometimes sorrowful, farewell between people who care about each other, such as friends, lovers, or family members before a long absence. Unlike neutral terms like 'líkāi' (to leave), 'fēn bié' carries connotations of finality, distance, and emotional resonance.

The word is commonly used in written Chinese and formal or literary speech, though it also appears in everyday conversation when describing significant goodbyes—e.g., at graduation, migration, or end-of-relationship moments. It can function as a verb (e.g., 'tāmen fēn bié le') or as a noun (e.g., 'yī cì nán wàng de fēn bié'). It does not imply physical separation alone but emphasizes relational or emotional rupture or transition.