不用说
bùyòngshuō · HSK 7
Needless to say
🤷 bù (not) + yòng (need) + shuō (say) = not-need-say
Each character spells out the meaning literally: don't need to say it. When something is obvious, you stack the three negation-utility-speech blocks together.
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'.
用 — pictograph of a bucket or wooden pail
用 originally depicted a bucket or container, possibly a sacrificial vessel made of wood. Over time it was borrowed to mean 'to use' or 'employ,' losing its concrete object sense. The modern meaning 'use' has been standard since early classical Chinese.
说 — speech radical 讠(言) + 兑
说 combines the speech radical 讠(言, 'words') with 兑, which acts as the phonetic component. The character originally meant 'to explain' or 'to speak,' and broadened to mean 'say' or 'talk.' The same graph is also read 'yuè' meaning 'pleased,' a sense later written 悦.