Translation of "Arbitrary" in Japanese

"This was an arbitrary decision.

「これは恣意的な決定だ

Our decision to go to Portugal was quite arbitrary.

私たちがポルトガルへ行こうと決めたのはまったくの気まぐれだった。

Of course, they are suffering from terrible working conditions such as low wages and arbitrary layoffs, as well as from various forms of discrimination.

低賃金、劣悪な労働条件、一方的な首切りなどの経済・労働問題はもとより、各種の人道的問題までも引き起こしている。