难关 nánguān difficulty
difficulty; crisis
How to remember 难关: 难 difficult + 关 to close = difficulty.
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How it is used
- A difficult hurdle / crisis to get through - 度过难关 (dùguò nánguān) to get through a tough time.
- A metaphorical 'pass/barrier' one must clear; strongly collocates with 度过/闯过/攻克难关.
- Implies a defined obstacle to be overcome, often financial or health-related, not just general difficulty (那用 困难).