不宜
bùyí · HSK 7
be unsuitable
🚫 bù = not + yí = suitable — literally not appropriate
The character 不 (not) combines with 宜 (suitable, fitting) to form a direct compound: not suitable. 宜 on its own means proper or appropriate, so 不宜 flags something as inadvisable or unfit for purpose.
不 — single pictograph; bird flying upward
Originally a pictograph in oracle bone script, traditionally interpreted as a bird flying up toward the sky and unable to come down, suggesting negation or refusal. Over time it became the standard negation word in Chinese, used before verbs and adjectives to mean 'not'.