zasmušilý znamená v angličtina

dour [dourer, dourest]▼(expressing gloom or melancholy)
adjective
[UK: dʊə(r)] [US: ˈdaʊər]

morose▼(sullen, gloomy; showing a brooding ill humour)
adjective
[UK: mə.ˈrəʊs] [US: məˈroʊs]

sombre▼(melancholy; dismal)
adjective
[UK: ˈsɒm.bə(r)] [US: ˈsɒm.bər]