colossal

とてつもない間違い

refers to a very serious error with significant consequences

非常に大きい、または深刻な誤り。

巨額

a very large amount of money

非常に多額のお金

甚だしい無駄

a very large and regrettable misuse of resources like time or money

時間やお金などの資源の非常に大きく、残念な誤用

refers to a very serious and often stupid mistake

巨大な像

a statue of immense size

非常に大きな像を指す

used to describe extreme and shocking rudeness or impudence