不便
búbiàn · HSK 6
inconvenient
🚫 不 (not) + 便 (convenient) = not convenient
不 negates and 便 means convenient or handy. Together they literally spell out inconvenient. The same 便 appears in 方便 (convenient) and 便利 (convenience), so 不便 is its direct opposite.
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'.
便 — person 亻 + change 更
A semantic compound: 亻(person) beside 更 (to change/replace). The original sense was a person making things easier or more convenient by adjusting them. From 'convenient' it extended to 'then/thereupon' (biàn) and to bodily 'discharge' (as in 大便).