expression, ichidan verb
have one's nose cut off; have one's nose mutilated
Literal, physical meaning: to suffer the cutting off or mutilation of one's nose. Often used in historical or violent contexts.
戦国時代には、敵に鼻を削がれることもあった。
In the Warring States period, one could have one's nose cut off by an enemy.
Compound of 鼻 (nose) + を (object marker) + 削がれる (passive of 削ぐ, to slice off). The literal meaning is 'to have one's nose sliced off'.