堅貞不屈

坚贞不屈
jiānzhēnbùqū
faithful and unchanging (idiom); steadfast

CEDICT

faithful and unyielding

Wiktionary

節操堅定，毫不屈服。

重編國語辭典

Entry Composition

1 堅貞 jiānzhēn
  1. firm
  2. unswerving
  3. loyal to the end
2 不屈 bùqū
  1. unyielding
  2. unbending