Sparkingchip:
she had used “rooves” as the plural of roof.
JRR Tolkein who, as an OED editor, knew better and said in his foreword to his books that the 'v' form was correct but he was using 'f' when he pluralised it for some reason I can't remember now
"You wouldn't believe the enormity of his charitable donations" (just look it up if you don't know what it really means....)]
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