'Accustomed' in the Bible

a wild donkey accustomed to the desert, sniffing the wind in her passion. When she's in heat, who can turn her away? None of the males who pursue her need to tire themselves out, for in her month they'll find her."

But not everyone has this knowledge. Some people are so accustomed to idolatry that when they eat food that has been offered to an idol, their conscience becomes contaminated because it is weak.