be somebody’s undoingFAILto cause someone’s shame, failure etc 是某人蒙羞[失败]的原因[祸根]
In the end, drink was his undoing.
最后,喝酒害了他。
Examples from the Corpus
undoing• Like Samson, the secret of her strength was her undoing.• Top weight and soft ground proved his undoing but he ran an absolutecracker to finish third to Sibton Abbey.• The knots took some undoing and then finally an impatient Adam tore off the string before slowly removing the muslin.• Such confidence was to be their undoing, and that of the Elves.• It was not until March in 1782 that the brothers made the error that was the beginning of their undoing.• If you fall into this trap, it will be your own doing - and your undoing.