できぬ

cannot, can't

d e̞ kʲ i n ɯ̟ → 出来る

でき can; be able to + ぬ Negative

verb Rare #33,826

cannot, can't An old-fashioned or literary negative form of できる; common in set phrases and dramatic dialogue.

JA: 私にはそんなことはできぬ。

EN: I can't do that.

Conjugation of 出来る

Potential

There’s nothing in this world that money can’t do.

It’s a show that can’t be expressed in mere words.

— ムーラン・ルージュ (2001)

That's an impossible request.

— 七人の侍 (1954)

Sounds similar to