Sayonara
来自Big Physics
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Japanese, short for sayō naraba, literally ‘if it be thus’.
wiktionary
Borrowed from Japanese さよなら(sayonara), shorter form of more traditional さようなら(sayōnara, “goodbye”, literally “if that's the way it is”).
etymonline
sayonara
"farewell, good-bye," 1875, from Japanese, said to mean literally "if it is to be that way," from sayo "that way," + nara "if."
