難むずかしい顔かおをする

expression, suru verb (irregular)

look displeased; frown; scowl; look grave; look serious

Describes a facial expression showing displeasure, worry, or deep thought. Often used when someone is troubled or concentrating hard.

See also: 難しい

• 彼かれは難むずかしい顔かおをして考かんがえ込こんでいた。

  He was deep in thought with a grave look on his face.

• 母ははは私わたしの成せい績せき表ひょうを見みて難むずかしい顔かおをした。

  My mother frowned when she saw my report card.