backslide
vi. 滑坡; 倒退; 退步; 故態復萌
1. drop to a lower level, as in one's morals or standards
Many Christians backslide because this truth is not clearly taught.
許多基督徒所以冷淡退後,就是因為不認識這個真理.
He's a reformed criminal who may yet backslide.
他是個經過改造的罪犯,然而仍有可能故態復萌.
I managed to keep of cigarettes for three months, but recently Iafraid I've begun to backslide.
我設法戒了三個月的煙, 但是最近我恐怕又開始故態復萌了.