From Middle English cathaloge, from Old French catalogue, from Late Latin catalogus, itself from Ancient Greek κατάλογος (katálogos, “enrollment, register”), from καταλέγω (katalégō, “to recount, make a list”), from κατα- (kata-, “downwards, towards”) + λέγω (légō, “to say, to speak, to tell”). Equivalent to cata- + -logue.