彼がばかだなんてとんでもない。

彼がばかだなんてとんでもない。

He is anything but a fool.

彼(かれ)がばかだなんてとんでもない。

Kare ga baka da nante tondemonai.

彼 (かれ)

he; him; his; boyfriend

が (が)

indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and

馬鹿 (ばか、バカ)

fool; idiot; trivial matter; folly; absurdity; foolish; stupid; dull; absurd; ridiculous; Mactra chinensis (species of trough shell)

だ (だ)

be; is; indicates past or completed action; indicates light imperative

なんて (なんて)

such as; (things) like; exclamation

トンデモ (トンデモ、とんでも)

unthinkable; unexpected; outrageous; offensive

Readings: ヒ、かれ、かの、か.の

Meanings: he, that, the