Blithe

беззабо́тный

bezzabótnyj

(casually careless or indifferent; showing a lack of concern)

беспе́чный

bespéčnyj

(casually careless or indifferent; showing a lack of concern)

весёлый

vesjólyj

(cheerful, happy — see also cheerful, happy)

жизнера́достный

žiznerádostnyj

(cheerful, happy — see also cheerful, happy)

легкомы́сленный

lexkomýslennyj

(casually careless or indifferent; showing a lack of concern)

небре́жный

nebréžnyj

(casually careless or indifferent; showing a lack of concern)

несерьёзный

neserʹjóznyj

(casually careless or indifferent; showing a lack of concern)

счастли́вый

sčastlívyj

(cheerful, happy — see also cheerful, happy)