adj. 25B6; adjective PLAYFUL, light-hearted, skittish, lively; coquettish, flirtatious, frivolous, flippant, superficial, trivial, shallow, silly; informal flirty, dizzy; poetic/literary frolicsome.
serious.
KITTENISH
Meaning of KITTENISH in English
Concise Oxford thesaurus English vocabulary. Краткий оксфордский словарь английского языка тезаурус. 2012