diabolical

1. ADJ If you describe something as diabolical, you are emphasizing that it is very bad, extreme, or unpleasant. 非常糟糕的; 極度的; 可惡的[非正式]

It was a diabolical error, a schoolboy error. 那是個(gè)糟糕透頂?shù)腻e(cuò)誤，一個(gè)小學(xué)生才會(huì)犯的錯(cuò)誤。

2. diabolicallyADV

...diabolically difficult clues. ...極其難解的線索。