Xenoglossia n. The supposed ability to communicate with others in a language which you do not know. (A term from the world of so-called "psychic research.") The impracticability of this concept is soon exposed if you attempt to talk with your teenager using some of the terms that you have heard him use in conversation with his friends. This will, however, at least afford him considerable entertainment, and you will be pressed, with much sniggering, to "say that again" — something that he will never otherwise say to you.
Each Tuesday, we’ll offer up a Superior Word for the edification of our Superior Readers, via the volumes of the inimitable Peter Bowler. You can purchase all or any of the four Superior Person’s Books of Words from the Godine website. Xenoglossia appears in the Third.