Cxe
Denotes coincidence of time or place. "Sit at the fire", "student at the university", "awaken at sunrise". Also "by" in phrases like "hold by the hand", "grab by the neck". But NOT "at" in phrases like "at 4:00". For this, je is used.
Information provided by the Esperanto HyperCourse Maintainer as part of the Esperanto HyperCourse.