熱ねっ誠せい

na-adjective, noun

earnestness; sincere enthusiasm

A somewhat formal, literary term for wholehearted dedication or fervor. Often used in written contexts to describe a person's attitude or effort.

• 彼かれの熱ねっ誠せいな態たい度どに心こころを打うたれた。

  I was moved by his earnest attitude.

• 熱ねっ誠せいを込こめて仕し事ごとに取とり組くむ。

  I tackle my work with sincere enthusiasm.