口

椅子に横たわる私に、歯科衛生士の女性が「はい、お口を開けてください」と言ったのです。

The woman dental hygienist said to me, lying down in the chair, "Right, please open your mouth."

あいつは口ばかりで、誠意がないね。巧言令色少なし仁とはよくいったもんだ。

They say fine words are no virtue if they're insincere and that's him in a nutshell. He's all talk but doesn't mean a word of it.

彼はまるで何でも知っているかのような口ぶりだ。

He talks as if he knew everything.