nothing could be further from the truth

US /ˈnʌθɪŋ kʊd bi ˈfɜːrðər frəm ðə truθ/
UK /ˈnʌθɪŋ kʊd bi ˈfɜːrðər frəm ðə truθ/
"nothing could be further from the truth" picture
1.

それは全くの誤解です, 真実とはかけ離れている

used to emphasize that something is definitely not true

:
Some people think I'm lazy, but nothing could be further from the truth.
私が怠け者だと思っている人もいますが、それは全くの誤解です
He claimed he was innocent, but nothing could be further from the truth.
彼は無実だと主張しましたが、それは全くの誤解です