adjective·n3

真ま面じ目め

Serious; earnest; conscientious (not joking, reliable)

真ま面じ目めな人ひと

彼かれは真ま面じ目めだ

Conjugations

dictionary真面目だmajime da

is serious / is earnest

negative真面目じゃないmajime janai

is not serious / is not earnest

past真面目だったmajime datta

was serious / was earnest

past negative真面目じゃなかったmajime janakatta

was not serious / was not earnest

te form真面目でmajime de

and being serious / because (being) serious

adverb真面目にmajime ni

seriously / earnestly (adverb)