na-adjective, noun
unreasonable; irrational; outrageous; absurd
Describes a situation, demand, or treatment that lacks logic, fairness, or justification, often with a strong emotional charge of frustration or indignation. Common in complaints about rules, expectations, or interpersonal behavior.
上司の理不尽な要求に困っている。
I'm troubled by my boss's unreasonable demands.
理不尽な理由でクビになった。
I was fired for an absurd reason.