至し誠せい

noun

sincerity; devotion

A somewhat formal or literary noun expressing utmost sincerity and wholehearted devotion. Often used in serious contexts such as moral philosophy, speeches, or written expressions of commitment.

• 彼かれの至し誠せいのこもった言こと葉ばに、皆みなが心こころを打うたれた。

  Everyone was moved by his words filled with utmost sincerity.

• 至し誠せいをもって事ことに当あたれば、必かならず道みちは開ひらける。

  If you approach matters with complete sincerity, a path will surely open.