stone-faced

 Longman Dictionary of Contemporary English 5++朗文当代英语 5++LDOCE 5++朗文 5++ˌstone-ˈfaced (also stony-faced) adjective  showing no emotion or friendliness 面无表情的；态度冷冰冰的

Examples from the Corpus

stone-faced• Ana, stone-faced, was washing clothes in the trough in the yard.

ˌstone-ˈfaced adjectiveChineseSyllable  

friendliness emotion Corpus or showing no

stone-faced

I

ˌstone-ˈfaced (also stony-faced) adjective
showing no emotion or friendliness

II

ˌstony-ˈfaced (also stone-faced) adjective
showing no emotion or friendliness:
    Tony stared at me in stony-faced silence.