homily (n.)

late 14c., omelye, from Old French omelie "homily" (12c., Modern French homélie), from Church Latin homilia "a homily, sermon," from Greek homilia "conversation, discourse," used in New Testament Greek for "sermon," from homilos "an assembled crowd," from homou "together" (from PIE *somalo-, suffixed form of root *sem- (1) "one; as one, together with") + ile "troop, band, crowd" (cognate with Sanskrit melah "assembly," Latin miles "soldier"). Latinate form restored in English 16c. A collection of them is a homiliary (1844).