adj.无理性的，失去理性的

英文释义

a. Not rational; void of reason or understanding; as, brutes are irrational animals.

a. Not according to reason; absurd; foolish.

a. Not capable of being exactly expressed by an integral number, or by a vulgar fraction; surd; -- said especially of roots. See Surd.

词干

irrational 不合逻辑的
→ ir-，不，非，rational，理智的，合逻辑的。