na-adjective, noun
sincerity; honesty; truthfulness; faithfulness
Refers to a quality of being sincere, honest, and faithful in character or action. Often used in formal or literary contexts.
彼の信実な態度に心を打たれた。
I was moved by his sincere attitude.
信実をもって人と接することが大切だ。
It is important to interact with people with sincerity.