goodbye, farewell
Related: adiós cará, adiós Madrid, que te quedas sin gente, adiós mis flores, adiosito
From a + Dios, literally “to God”, from Medieval Latin ad Deum (“to God”); compare Aragonese, Asturian, and Extremaduran adiós, Catalan adeu, Dutch aju, ajuus, Low German atjüs, English, French, and Occitan adieu, Galician and Portuguese adeus, German tschüss, Greek αντίο (antío), Italian addio, Maltese addiju, Mirandese adius, Romanian adio, Serbo-Croatian ади̏о/adȉo, Slovene adȋjo.