arbitrary
🇺🇸
/ˈɑːrbɪtreri/
🇬🇧
/ˈɑːbɪtrəri/
based on personal choice or random chance, not reason or rules
The teacher's decision to give extra homework seemed arbitrary and unfair to the students.
先生が追加の宿題を出すという決定は、恣意的で生徒にとって不公平に思えた。
using power without limits or fairness
The king's arbitrary rule angered the people who wanted fair laws.
王の専制的な統治は、公正な法律を求める人々を怒らせた。