固若金汤 (gù rě) — strongly fortified, impregnable

Definition

Examples

• 这个城市的防守固若金汤，敌人很难攻破。
  Zhè ge chéng shì de fáng shǒu gù rě, dí rén hěn nán gōng pò.
  This city's defenses are as solid as metal and boiling moat — the enemy can hardly break through.
• 经过多次加固，他们的阵地固若金汤。
  Jīng guò duō cì jiā gù, tā men de zhèn dì gù rě.
  After multiple reinforcements, their position became impregnable.
• 他在辩论中的论据固若金汤，无人能反驳。
  Tā zài biàn lùn zhōng de lùn jù gù rě, wú rén néng fǎn bó.
  His arguments in the debate were as solid as iron — nobody could refute them.