Acting without words; letting actions speak louder than words — a four-character idiom emphasizing action over talk.
彼女は不言実行の人で、約束したことは必ずやり遂げる。
She is a person of action; she always follows through on her promises.
不言実行の態度は、職場で信頼を築く一つの方法だ。
A 'actions-not-words' attitude is one way to build trust in the workplace.
彼は不言実行で、会議では控えめだが成果を出す。
He is low-key in meetings but delivers results by acting rather than talking.