n.不信神；不忠
He had some letters, and was ingenious, but he was an infidel. 他有一些学问，且很有见地，但却对宗教不屑一顾。
She closed her eyes to her husband's infidelities. 她丈夫有不忠行为，她却视而不见。
The photo was final proof of her husband's infidelity. 这张照片最终证明了她丈夫的不忠。
