Okay, that's fair. Su-jin's spoken English for a long time, and a lot of other languages before that so there's definitely a pronounced accent to it. So, he repeats the word, sounding it out more slowly. "Con-fi-den-tial. As in, secret." He even turns his phone so Aqua can have a better look at the email. It's nothing related to his work. Just some things he needs to schedule: the accountant, a visit to a storage unit, a manicure... Not that Aqua car read any of it. Su-jin doesn't know that, though. "See? It's nothing secret. So it's not too rude that you looked."