Nantoka/信誓旦旦xìn shì dàn dàn信誓旦旦 (xìn shì dàn dàn) is a Chinese word meaning “to make a solemn vow”.Meanings1to make a solemn vowCharacters in 信誓旦旦信xìn · letter誓shì · oath旦dàn · (literary) dawn; daybreak旦dàn · (literary) dawn; daybreakRelated words相信to believe; to be convinced; to accept as true信letter信息information; news; message发誓to vow信任to trust一旦in case (sth happens)信号signal难以置信(idiom) hard to believe; incredible信仰to believe in (a religion)确信to be convinced自信to have confidence in oneself信心confidenceStudy Chinese with flashcards →