adieu
interjection
°Said to wish a fond farewell; good-bye.
noun
°A farewell, a goodbye; especially a fond farewell, or a lasting or permanent farewell.
synonyms: addio, adios, aloha, arrivederci more» , auf wiedersehen, au revoir, bye, bye-bye, cheerio, cheers, ciao, farewell, good-by, good-bye, goodbye, good day, sayonara, shalom, so long