unusefulness

Noun

uncountable

The quality of being unuseful.

Japanese Meaning

役に立たなさ / 無用性 / 使えなさ

Despite her careful planning, she couldn't deny the unusefulness of the outdated manual in solving modern problems.

念入りに計画したにもかかわらず、彼女は古いマニュアルが現代の問題を解決する上での無用さを否定できなかった。

Sense（1）

The quality of being unuseful.