不真面目(ふまじめ)

ふまじめ
na-adjective
not serious; frivolous; lax; irresponsible
personality
1. not serious; frivolous; lax; irresponsible
lacking in earnestness or diligence; not taking things seriously when one should
不真面目(ふまじめ)な態度(たいど)はやめなさい。
Stop fooling around and take this seriously.
彼(かれ)は仕事(しごと)に不真面目(ふまじめ)だ。
He's not serious about his work.
不真面目(ふまじめ)な生徒(せいと)は先生(せんせい)に叱(しか)られた。
The unserious students were scolded by the teacher.

Forms

不(ふ) (not) + 真面目(まじめ) (serious, earnest); the opposite of 真面目(まじめ).

Usage

Criticizes a lack of earnestness about work, study, or responsibilities: skipping, slacking, joking when one should be serious. It says nothing about honesty.

Common collocations

Similar words

  • 不誠実(ふせいじつ): insincere, not keeping faith with people; a moral failing, where 不真面目(ふまじめ) is a lack of effort
  • いい加減(かげん): sloppy, halfhearted, unreliable
  • ふざける: to joke around, fool about (the behavior itself)

Related Words

Antonym: 真面目(まじめ) (serious, earnest)
Related: 不誠実(ふせいじつ) (insincere, dishonest)
Related: いい加減(かげん) (halfhearted, sloppy)
Related: ふざける (to joke around, not be serious)
general
Added 2026.1.25 20:38 · Revised 2026.9.24 12:23
08000/08274_fumajime