noun
mind and composure; mental state and demeanor
Refers to one's inner state and outward expression simultaneously; often used in contexts of maintaining or losing composure. Somewhat literary.
彼はどんな時でも神色を崩さない。
He never loses his composure no matter the situation.
その知らせを聞いても、彼女の神色は変わらなかった。
Even after hearing the news, her expression and demeanor remained unchanged.