信誓旦旦 (xìn shì dàn dàn) — to make a solemn vow with great earnestness (often used ironically about lovers' promises)

Definition

An idiom for swearing earnest, solemn vows — but in modern use it almost always carries ironic or skeptical tone, implying the promises were not kept.

idiom
to make a solemn vow with great earnestness (often used ironically about lovers' promises)

Examples

  • 信誓旦旦,。
    Tā xìn shì dàn dàn dì shuō huì yǒng yuǎn ài wǒ, kě méi guò liǎng gè yuè jiù biàn le xīn.
    He solemnly vowed to love me forever, but within two months he changed his heart.
  • 信誓旦旦,。
    Liàn ài shí xìn shì dàn dàn de chéng nuò, fēn shǒu hòu wǎng wǎng yì wén bù zhí.
    The solemn vows made during love often become worthless after a breakup.
  • 信誓旦旦,。
    Bié tīng tā xìn shì dàn dàn de huà, tā cóng lái dōu bú duì xiàn.
    Don't listen to his solemn promises — he never keeps them.

Origin

Compound word
构词法gòucífǎ
主谓zhǔwèiSubject + predicate

A small sentence frozen into a word: something, and what it does or is.

信誓faithful vow
偏正Modifier + head
旦旦earnest
旦dànclear旦dànclear
重叠Reduplication

The 信誓 is a trustworthy vow, and 旦旦 gives it an earnest, sincere tone.

Characters in this word

Most characters — around four in five — are built this way: one part hints at the meaning, the other at the pronunciation.

Meaning part形符xíngfú
言言yánwords
Sound part声符shēngfú
人
人rén信xìn
The sound has drifted apartThe sound part was a clue two thousand years ago — it often still helps, but not always.

信 pairs 人 as the sound part with 言 (words) as the meaning part.

Open 信 →

Most characters — around four in five — are built this way: one part hints at the meaning, the other at the pronunciation.

Meaning part形符xíngfú
言言yánspeech
Sound part声符shēngfú
折
折zhé誓shì
The sound has drifted apartThe sound part was a clue two thousand years ago — it often still helps, but not always.

誓 is built from 言, meaning speech, and 折, which provides the sound. The speech part shows it is about spoken words, such as a vow.

Open 誓 →

Most characters — around four in five — are built this way: one part hints at the meaning, the other at the pronunciation.

Meaning part形符xíngfú
Sound part声符shēngfú
丁
丁dīng旦dàn
The sound has drifted apartThe sound part was a clue two thousand years ago — it often still helps, but not always.

旦 combines 日 (sun/day) with 丁 as a sound part; the story about the sun rising over a line is not the original explanation.

Open 旦 →

Most characters — around four in five — are built this way: one part hints at the meaning, the other at the pronunciation.

Meaning part形符xíngfú
Sound part声符shēngfú
丁
丁dīng旦dàn
The sound has drifted apartThe sound part was a clue two thousand years ago — it often still helps, but not always.

旦 combines 日 (sun/day) with 丁 as a sound part; the story about the sun rising over a line is not the original explanation.

Open 旦 →

Browse more HSK 7-9 words or search the full 43,000-word dictionary.