nature, property, disposition
Example sentences
彼は人懐っこい性質だ。
He has a friendly nature.
彼は何かをやり出すとそれに凝る性質です。
When he begins to do anything, he devotes himself to it.
彼はとても優しい性質で、大きな声を出すのも聞いたことがない。
He is so mild in disposition that I have never heard him speak in a loud voice.