irrational

His irrational fear of spiders meant he could not even look at a photo of one.

(Chinese) 他对蜘蛛有着不合理的恐惧，这意味着他甚至不敢看一张蜘蛛的照片。

It is irrational to blame the cat for breaking the vase when you left it on the edge of the table.

(Chinese) 当你把花瓶放在桌子边缘时，责怪猫打碎了它是没有道理的。