a person who lends someone money with the agreement that they will pay back a very much larger amount of money later

Usurers continued to exploit the poor until people could take it no more. 高利贷者继续剥削穷人，直到人们再也受不了为止。

Vast fortunes were made by employers and usurers at the expense of small proprietors. 雇主和高利贷者以牺牲小业主为代价赚取了巨额财富。