Unreasonable
Irrational
noun, な adjective
りふじん
無理 (むり) Impossible, Unreasonable, Overdoing
理不尽 (りふじん) Unreasonable, Irrational
無闇に (むやみに) Thoughtlessly, Unreasonably, Recklessly, Absurdly
Asking someone to use a leaf りふ to drink gin じん is Unreasonable.