inexplicableness

uncountable

the state of being difficult to account for; the state of being inexplicable

Japanese Meaning

説明不可能である状態 / 不可解さ / 説明しがたい性質

Despite hours of investigation, the inexplicableness of the power outage frustrated the engineers.

数時間にわたる調査にもかかわらず、停電の説明のつかなさが技術者たちを苛立たせた。

Sense（1）

the state of being difficult to account for; the state of being inexplicable