At a glance
Noun₁ にあるまじき Noun₂ means "a Noun₂ that is unbecoming of (unworthy of) a Noun₁". It is a formal, mostly written expression used to strongly criticize behavior that someone in a certain role or position should never show.
Noun₁ に あるまじき Noun₂
教師にあるまじき行為だ。 That is conduct unbecoming of a teacher.
How to form it
あるまじき does not conjugate. It always sits between two nouns:
| Part | What goes there | Example |
|---|---|---|
| Noun₁ | A role, job or status | 教師, 政治家, 医者 |
| に | Fixed particle | 教師に |
| あるまじき | Fixed form, "should not be" | 教師にあるまじき |
| Noun₂ | An action, remark or attitude | 行為, 発言, 態度 |
Register: formal and literary. To end a sentence, add だ, です or である after Noun₂.