stony-faced

Showing no (or little) expression of emotion; poker-faced.

Japanese Meaning

無表情な / 感情を見せない / ポーカーフェイス

She remained stony-faced throughout the entire meeting, revealing nothing of what she thought.

彼女は会議中ずっと無表情で、自分の考えを一切見せなかった。

Sense（1）

Showing no (or little) expression of emotion; poker-faced.

more stony-faced

（ comparative ）

most stony-faced

（ superlative ）