na-adjective, noun
busy; hectic; pressed with work
Describes a state of being extremely busy, often due to work or business demands. Commonly used in formal or written contexts.
年末はどの会社も繁忙を極める。
At the end of the year, every company is extremely busy.
繁忙期には残業が増える。
During the busy season, overtime increases.
Compound of 繁 (many, abundant) and 忙 (busy). The spelling 煩忙 uses 煩 (trouble, worry) instead, but is rare.