忠貞不渝 [－贞－－]

Jyutping zung1 zing1 bat1 jyu4
Pinyin zhōng zhēn bù yú

Definitions (CC-CEDICT)
  1. unswerving in one's loyalty (idiom); faithful and constant
Definitions (Wiktionary)
  1. phrase, idiomatic
    to be steadfastly faithful
Definitions (Kaifangcidian)
  1. （沒有對應漢語詞彙）