nana1

noun
🔊/ˈnænə/
🔊/ˈnænə/
(British English also nanna)
(also (British English also)nan, nanny)
(informal)
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  1. (used by children, especially as a form of address儿童用语,尤作称呼) a grandmother祖母;外婆
    Word Originmid 19th cent.: child's pronunciation of nanny or gran.

nana2

noun
🔊/ˈnɑːnə/
🔊/ˈnɑːnə/
(old-fashioned, British English, informal)
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  1. a stupid person呆子;傻瓜 synonym idiot
    • I felt a right nana.我觉得自己真傻。🔊🔊
    Word Origin1960s: perhaps a shortening of banana.