失去的英文动词是"lose"，来自古英语"losian"。

例句：

I lost my keys. (我把钥匙丢了。)
He lost the game. (他输了比赛。)
She lost a lot of weight. (她减了很多重量。)
They lost their way. (他们迷路了。)

注意：当表示“失去机会”时，可以用"miss"，例如 "I missed the chance to meet him." (我错过了和他见面的机会。)