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Etymology data from Wiktionary via Wiktextract (CC BY-SA 4.0). Chinese character data from the 說文解字, the Taiwan MOE 國語辭典簡編本 (CC BY-ND 3.0 TW) and HSK/TOCFL lists.

Explanations are written by a local model (gemma4) and only published after a verification pass against the cited sources. How it works.

Chinese

不知所以

/pu⁵¹ ʈ͡ʂɻ̩⁵⁵ su̯ɔ²¹⁴⁻³⁵ i²¹⁴⁻²¹⁽⁴⁾/
to now know why it is so; to not know the reason
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    Etymology graph

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    Origin

    The phrase is formed from four characters. 不 means not, un-, in-, il-, im-, or ir-. 知 means to know, to understand, or to comprehend. It is composed of the components 大 (of great size, big, large, or huge), 口 (mouth, especially the lips and internal mouth cavity), and 子 (child, offspring, or descendant).

    所 means place or location. It contains the semantic component 斤 (a traditional unit of weight, a catty or jin, equal to 0.5 kilograms) and the phonetic component 戶 (door). The final character, 以, is a preposition that expresses a boundary in time, orientation, direction, or means.

    Confidence: high · written by gemma4:26b, checked statement-by-statement against the sources below.

    Lineage

    • characterChinese不 “not; un-; in-; il-; im-; ir-”
    • characterChinese知 “to know; to understand; to comprehend”
      • ideaChinese大 “of great size; big; large; huge”
      • ideaChinese口 “mouth, especially the lips and internal mouth cavity (Classifier: 把 c)”
      • ideaChinese子 “child; offspring; descendant”
    • characterChinese所 “place; location”
      • soundChinese戶 “door”
      • meaningChinese斤 “catty or jin, a traditional unit of weight, equal to 0.5 kilograms”
    • characterChinese以 “a preposition that expresses a boundary in time, orientation, direction or quantity”
    Wiktionary etymology text

    No etymology text yet. The graph shows what is known from the sources.

    Meanings

    phrase
    1. to now know why it is so; to not know the reason

    Sources

    • etymagent (local gemma4:26b) — Generated
    • Written form — n/a
    • Wiktionary (via Wiktextract / kaikki.org) — CC BY-SA 4.0