ineptness

uncountable usually

The quality or degree of being inept.

Japanese Meaning

無能さ（能力不足で、適切に行動できない状態） / 不器用さ（行動・動作がぎこちない状態） / 不適切さ（適性がなく、適当ではない性質や程度）

His persistent ineptness at managing the team eventually led to his dismissal.

彼のチーム運営における継続的な無能さが結局解雇につながった。

Sense（1）

The quality or degree of being inept.

The ineptness of the novice jugglers was apparent as they frequently dropped their juggling pins.

ineptnesses

（ plural ）