途方もない

enormous

→ 途方
phrase Rare #36,504
enormous Describes something extraordinarily large, excessive, or unreasonable. It can modify amounts, sizes, mistakes, stories, and similar things.
JA: 彼は途方もない金額をその車に使った。
EN: He spent an enormous amount of money on that car.

そんな途方もない話は聞いたことがない

I've never heard anything so far-fetched.

彼は不注意のため途方もない失策してしまった

His carelessness led him to make a colossal blunder.

彼女は私に途方もない金額要求してきた

She demanded an exorbitant amount of money from me.

これどれだけ途方もないお金をつぎ込んだご覧なさいほら

Just look at how much of an astronomical amount of money I’ve poured into this—see!

— かぐや姫の物語 (2013)