This is the 10102nd most frequent Korean word.
과오에
"과오에" means "to a fault" or "on a mistake/error" depending on the context.
In this sentence, '과오에' is used to refer to one's fault or mistake.
그의 과오에 대해 이야기해 보겠습니다.
Let's talk about his mistake.
Here, '과오에' emphasizes the context of mistakes despite which actions were taken.
과오에도 불구하고, 그는 열심히 노력했다.
Despite the mistakes, he worked hard.
In this usage, '과오에' refers to the act of considering or addressing faults or errors.