la copie cachée
/kɔ.pi ka.ʃe/ noun · feminine C2- blind carbon copy (copy of an email message that is sent to a person (often one of many) other than the primary recipient without the express knowledge of the other recipients) · mettre quelqu'un en copie cachée to BCC someone
Learn copie cachée in real texts
With a free account, hover any word in the library for its meaning, hear it read aloud, save words for review timed to your memory, and see how much of each book you already know.