繁忙 (fánmáng) is an adjective meaning 'busy'—specifically describing a state of having many tasks, responsibilities, or demands on one’s time and energy. The first character 繁 (fán) means 'numerous', 'complex', or 'prolific', while the second character 忙 (máng) means 'busy' or 'rushed'. Together, they intensify the sense of busyness—suggesting not just momentary haste but sustained, heavy workload or activity. It’s commonly used to describe people, schedules, places (e.g., a bustling city center), or periods (e.g., year-end).

This word carries a neutral-to-slightly formal tone and is more common in written Chinese and formal speech than in casual conversation, where simpler 忙 (máng) often suffices. It frequently appears in compound nouns like 繁忙期 (fánmáng qī, 'busy season') or as a predicate: '他最近很繁忙' ('He has been very busy recently'). It implies objective, external demands—not just subjective feelings of stress.