'Kùn nán' literally combines 'kùn' (to be trapped, confined, or exhausted) and 'nán' (difficult, hard), together evoking a strong sense of being mentally or physically constrained by challenges. As a noun, it refers to concrete obstacles—such as financial strain, language barriers, or complex tasks—and as an adjective, it describes situations or problems that are inherently tough to overcome.

It’s commonly used in formal and everyday contexts: in news reports about economic hardship, in personal conversations about study or work struggles, and in written advice ('facing difficulties', 'overcoming difficulties'). Unlike the more casual 'wèntí' (problem), 'kùn nán' carries emotional weight—it suggests effort, stress, or even suffering, not just inconvenience. It often appears with verbs like 'yǒu' (to have), 'miǎn lín' (to face), or 'jiě jué' (to solve).