know-nothing

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A completely ignorant, uninformed, or unknowledgeable person. I wish my father had never hired a know-nothing like you to manage our accounts!

Name	Pronounced	Usage
Ernestina	-	Italian
Grethe	-	Danish, Norwegian
Tzidkiyahu	-	Biblical Hebrew
Hughie	HYOO-ee	English
Vivyan	VIV-ee-ən	English (Rare)
Sky	SKIE	English (Modern)