Tra từ unheard of - Từ điển Việt Anh Việt 4in1 - English Vietnamese 4 in 1 Dictionary

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Từ điển Việt Anh Việt 4in1 - English Vietnamese 4 in 1 Dictionary

unheard of unˈheard of BrE AmE , unheard-of adjective something that is unheard of is so unusual that it has not happened or been known before: Travel for pleasure was almost unheard of until the 19th century.