恬不知耻的不感到或显示悔恨，羞耻的，毫无歉意的。

Feeling or showing no remorse, shame, or need for apology.

youdao

我很不知耻的自己提到自己最喜欢的前10位，因为我觉得自己已经为那些还没有略读过档案的人收录了一些文章。

Ok, it's shamelessly self-promotional to put myself on my own Top 10 list, but I thought I'd include some decluttering articles for those who haven't looked through the archives.

youdao

她恬不知耻地承认了让他回到屋里的事。

She had brazenly admitted allowing him back into the house.

《牛津词典》