根も葉もない， ねもはもない
1. groundless (rumour, accusation, etc.), unfounded, baseless, without a shred of truth
tbd
思いがけない大きな財産がころがりこんでくると信じることは、根も葉もないことだ。
tbd
To believe that an unexpected big fortune will come your way is to build a castle in Spain.
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それは根も葉もない話だ。
tbd
It is a story made out of whole cloth.
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そのうわさは根も葉もないことが分かった。
tbd
The rumor turned out to be groundless.
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そのあてもないのに、父親の財産相続を口にするとは、ボッブも根も葉もないことをいう人だ。
tbd
Bob went about building his castle in Spain when he spoke of inheriting his father's wealth.
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