プログレッシブ和英中辞典(第4版)の解説
うかぬかお【浮かぬ顔】
彼は息子の行状のことで浮かぬ顔をしている
He looks gloomy [disheartened] because of his son's behavior.
何で浮かぬ顔をしているのか
What makes you 「pull such a long face [look so glum]?/《俗》 Why do you look so 「down in the dumps [blue]?
母は浮かぬ顔で帰って来た
Mother looked depressed [dejected] when she came back./Mother came back with a melancholy look.