expression, ichidan verb
soften one's tone; lower one's voice
Used when someone deliberately makes their speech less forceful, aggressive, or confrontational, often to show deference or avoid conflict.
上司に反論するときは、語気を弱めて話したほうがいい。
When arguing with your boss, it's better to soften your tone.
彼は急に
He suddenly lowered his voice and began to apologize.