uncharacteristically
adverb3 コロケーション平均頻度: 5.1
柄にもなく静か
being less talkative or noisy than is usual for the person.
いつもより口数が少なかったり、物静かであること。
not speaking when it is unusual for the person to be so.
behaving in a shy or reserved way that is not typical for the person.