unsmiling
🇺🇸
/ˌʌnˈsmaɪlɪŋ/
🇬🇧
/ˌʌnˈsmaɪlɪŋ/
Not showing a smile; having a serious or stern expression.
The guard at the museum had an unsmiling face as he watched the visitors.
博物館的保安在監視參觀者時,面無表情。