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.
彼の熱誠な態度に心を打たれた。
I was moved by his earnest attitude.
熱誠を込めて仕事に取り組む。
I tackle my work with sincere enthusiasm.