GRAMMAR DETAIL

〜まじき

unbecoming of

Strongly condemns conduct as unacceptable for someone with a particular social responsibility.

Examples

患者の記録を改ざんするのは、医師にあるまじき行為だ。

Falsifying patient records is conduct unbecoming of a doctor.

約束を破るのは、友人にあるまじき行為だ。

Breaking a promise is conduct unbecoming of a friend.

証拠を隠すなど、警察官にあるまじき行為だ。

Concealing evidence is conduct unbecoming of a police officer.

Structure: In phrases such as 医師にあるまじき行為, attach にあるまじき to a role and modify a following noun to condemn conduct as unworthy of that role.
Basic usage: 患者の記録を改ざんするのは、医師にあるまじき行為だ。 condemns falsifying patient records as conduct wholly unbecoming of a doctor.

まじき as a noun modifier
- In あるまじき行為だ, まじき modifies 行為, and だ ends the sentence after that noun. あってはならない directly states through a verb expression that something must not occur.