CIAO


Meaning of CIAO in English

/ tʃaʊ; NAmE / exclamation

(from Italian , informal ) goodbye

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WORD ORIGIN

1920s: Italian , dialect alteration of schiavo (I am your) slave, from medieval Latin sclavus slave.

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.