不可思议
bù kě sī yì · HSK 7
unimaginable
🤯 bu ke si yi = not-can-think-discuss: so strange you cant even talk about it
Each character builds the idiom: 不 (not) 可 (can) 思 (think) 议 (discuss/debate). Something so far beyond normal that thinking and talking both fail to capture it.
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'.
可 — mouth 口 + breath marker 丁 (modified)
可 originally depicted a mouth (口) with a curved stroke suggesting exhaled breath or speech, conveying approval or assent. From this came the meaning 'to permit' or 'can,' as granting permission was expressed verbally. Today it broadly means 'may,' 'can,' or 'approve.'
议 — speech radical 讠 (言) + 义 (yì, righteousness)
议 is a semantic-phonetic compound. The speech radical 讠 (言) signals meaning related to talking, while 义 supplies the sound 'yì'. Together they convey discussing or deliberating—literally 'speech about what is right,' which fits its modern senses of 'discuss' and 'proposal.'