Apopemptic is an adjective that means related to departing.

Our word of the day began in Greek as a synonym of dismiss. In time, it came to refer to a song delivered to someone upon departure. After its importation into English, it became an adjective that is roughly a synonym of parting, for example:

When he quit the office, Steve’s apopemptic advice was to make sure I got the desk closest to the copy machine. These parting words were the wisest ones he’d ever spoken.