难以置信
nán yǐ zhì xìn · HSK 7
hard to believe
🤯 难 nán (hard) + 以 yǐ (to) + 置信 zhìxìn (place trust) = hard to place trust in
置 zhì means to place or set down; 信 xìn means belief or trust. So 难以置信 literally reads as hard-to-place-belief: a fact so far-fetched you cannot set your trust on it. Use it for jaw-dropping, incredible news.
难 — 又 (right hand) + 隹 (short-tailed bird)
Originally written with 堇 (clay) plus 隹 (bird), 難 depicted a rare bird and was borrowed to mean 'difficult.' The modern simplified form replaces the left side with 又 (hand). The phonetic role of the original left component gave the reading nán.
以 — phonetic 㠯 (plow/tool) + 人 (person)
Originally a pictograph of a hand-held plow or tool (㠯), later combined with 人 (person) to suggest 'using' something. The core meaning 'to use' extended metaphorically to 'by means of', 'with', and 'because of'. In modern Chinese it functions mainly as a grammatical particle.
置 — net 罒 (top) + straight 直 (bottom)
Originally a phono-semantic compound: the net 网/罒 on top suggested the idea of catching or pardoning a criminal, while 直 ('straight, upright') gave the sound and hinted at setting things upright. The meaning shifted from 'pardon, set free' to the modern senses 'place, put, set up, establish'.
信 — person 亻 + speech 言
信 combines 亻(person) with 言(speech), depicting a person standing by their words. The original sense is 'truthfulness' or 'sincerity'—what a person says can be trusted. From this it extended to 'believe,' 'trust,' and later 'message' or 'letter,' since a letter carries one's word.