An indelible mark or substance is impossible to remove by washing or in any other way.洗不掉的;无法去除的
indelible ink洗不掉的墨水渍
The blood had left an indelible mark on her shirt.她衬衫上留下的血迹洗不掉。
[ before noun ] Indelible memories or actions are impossible to forget, or have a permanent influence or effect.(记忆或行为)不可磨灭的,忘不掉的
I have an indelible memory of that meeting with Anastasia.我永远忘不了那次与阿纳斯塔希亚的会面。
In his 20 years working for the company, Joe Pearson made an indelible impression on it.在为公司工作的20年中,乔‧皮尔逊给公司留下了难以磨灭的印象。