避难 (bì nàn) literally combines 避 (bì, 'to avoid, evade') and 难 (nàn, 'calamity, disaster, hardship'). Together, it means 'to take refuge' or 'to seek asylum'—specifically to flee danger and find safety, often during emergencies like earthquakes, fires, wars, or persecution. It emphasizes intentional movement to a secure location, not just passive safety.

This verb is commonly used in formal, news-related, or humanitarian contexts—such as government announcements about evacuation routes, refugee policies, or disaster preparedness. While it can describe individual action ('they fled to the mountains to 避难'), it’s frequently used with collective subjects or institutions ('the city opened shelters for those seeking to 避难'). Unlike more general terms like 躲 (duǒ, 'to hide'), 避难 implies structured, purposeful relocation for survival or legal protection.