Maybe our lexicon or FAQ ought to include a list of actual or probable Epicurean "idioms"
If we're going that route, my suggestion would be to have an entry for "Empty" Desires and then make a point of saying "this is the word Epicurus used to describe desires which..." I don't think we should shy away from his modifier but understand it may need some context. I maintain it's a good word and gets at the unsatisfying nature of the empty desires, like "empty" calories, empty handed, empty headed, etc.