◆stone-faced
LONGMAN's definition
/also stony-faced/ showing no emotion or friendliness
The stone-faced former Yokozuna made no comment as he got into a car.
元横綱(北の湖・日本相撲協会理事長)は硬い表情で無言を貫き、車に乗り込んだ。
◆stone-face : (石のように)無表情な、まるで感情を表さない
◆former : 元の、初期の