嚴肅 angolul

serious▼(without humor or expression of happiness)
adjective
[UK: ˈsɪə.rɪəs] [US: ˈsɪ.riəs]

deadpan▼(deliberately impassive or expressionless (as a face or look))
adjective
[UK: ˈded.pæn] [US: ˈded.ˌpæn]