確かっ固こ不ふ動どう

noun which may take the genitive case particle 'no', noun

unshakeable; steadfast; firm; absolutely secure

Describes a belief, attitude, support, or position that is completely unwavering and cannot be moved. Often used in formal or written contexts.

• 彼かれの確かっ固こ不ふ動どうの信しん念ねんは、どんな困こん難なんにも揺ゆるがなかった。

  His unshakeable conviction never wavered in the face of any hardship.

• この計けい画かくには確かっ固こ不ふ動どうの支し持じが必ひつ要ようだ。

  This plan needs steadfast support.