彼はいつも穏やかな口調で話す。
He always speaks in a gentle tone.
na-adjective
moderate; reasonable; amicable
Used for opinions, attitudes, or negotiations that are moderate, not extreme, and conciliatory.
彼の提案は穏やかな内容だった。
His proposal was moderate in content.
話し合いは穏やかな雰囲気で進んだ。
The discussion proceeded in an amicable atmosphere.