If you describe something such as a desire or force as irresistible, you mean that it is so powerful that it makes you act in a certain way, and there is nothing you can do to prevent this.
双语例句
例： It proved an irresistible temptation to Bob to go back.
事实证明，回去对于鲍勃来说是一种无法抵抗的诱惑。