unassuming

1. ADJ If you describe a person or their behaviour as unassuming, you approve of them because they are quiet and do not try to appear important. 不裝腔作勢的; 謙遜安靜的[表贊許]

He's a man of few words, very polite and unassuming. 他不愛說話，非常有禮貌，也不裝腔作勢。