Inure

[ in-yoor ]

verb

1. accustom (someone) to something, especially something unpleasant; to become immune to unpleasant events or situations

Examples of inure in a sentence:

• After a while, the guards were able to inure themselves to the voices of the prisoners begging for freedom.  
• Although the athlete was taking a strong medication, he left the game because he was not able to inure himself to the pain.