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信誓旦旦

Mandarin · pinyin xìn shì dàn dàn

to make a solemn vow

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Characters in this entry

信: xìn · trust, believe; letter
誓: shì · swear, pledge; oath
旦: dàn · dawn; morning; day

Written characters and their own readings; the entry’s pronunciation is shown above.

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Mandarin tones

4–4–4–4 · xin4 shi4 dan4 dan4

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Read this spelling in Classical texts

Follow a written form into the eight pinned witnesses: Analects, Mencius, Laozi, Zhuangzi, Xunzi, Han Feizi, Sunzi and the Mao Shijing. A match is a place to investigate; it does not prove that a modern dictionary sense fits the passage.

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Compare dictionary sources Wiktionary · 1 sense · 1 Cantonese reading

Rime Cantonese 粵拼

seon3 sai6 daan3 daan3

Cantonese word readings for 信誓旦旦. This lexicon supplies readings, not definitions.

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Wiktionary English definitions · Chinese section

Independent source senses for this spelling, with usage labels retained. Not matched to the pronunciation above.

phrase

(idiomatic) pledging in all sincerity; vowing solemnly

Source page · dump 2026-09-02 · Contributors & history

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