牢不可破 (láo bù kě pò) | Meaning: (idiom) (usu. of sth abstract: an alliance, a conviction etc) unbreakable; rock-solid | Chinese Idiom with Pinyin & Origin

steady as Mt Tai · as safe as houses稳如泰山wěn rú Tài Shān

(idiom) invulnerable; indestructible; impregnable坚不可摧jiān bù kě cuī

stable · steady · firm · to stabilize稳固wěn gù

copper wall, iron bastion (idiom); impenetrable defense铜墙铁壁tóng qiáng tiě bì

solid; unbreakable · (fig.) irrefutable; incontrovertible; indisputable颠扑不破diān pū bù pò

(idiom) (usu. of sth abstract: an alliance, a conviction etc) unbreakable; rock-solid