Inure - Making someone or oneself habituated, especially to a painful experience or a difficult experience.
Open Word Class - Verb
1. He has been inured of being bitten by a snake; after all he is a snake catcher.
2. Every day he drinks about 11 glasses of wine, I think is inured of it.
3. My God, this man simply looks to be inured of singing for hours, might be dumb one day.