adj. 25B6; adjective SERIOUS, solemn, sober, sombre, grave, grim, dour, unsmiling, stony-faced; gloomy, glum, sad, melancholy, dismal, joyless, cheerless, lugubrious; boring, tedious, dull, dry.
jovial.
HUMOURLESS
Meaning of HUMOURLESS in English
Concise Oxford thesaurus English vocabulary. Краткий оксфордский словарь английского языка тезаурус. 2012