な顔

a ... face

→ だ

phrase Common #5,122

a ... face Used after a な-adjective or descriptive phrase to describe someone's facial expression, such as 真剣な顔 (a serious face) or 不安そうな顔 (an anxious-looking face).

JA: 彼は不安そうな顔でこちらを見た。

EN: He looked at me with an anxious expression.

なぜ彼は不機嫌な顔をしてるんだい。

Why does he look so grumpy?

なんでみんな、そんな不機嫌そうな顔してんの？

Why does everyone look so grumpy?

そんな退屈そうな顔しないの。

Don't look so bored.

敬三お母さんおだやかな顔だよ

Keizo, Mom has such a peaceful look on her face.

— 東京物語 (1953)