Lack or absence of something necessary; a deficiency or shortage, often used in abstract contexts.
経験の欠如が今回の失敗の一因だ。
A lack of experience was one of the causes of this failure.
リーダーシップの欠如は組織の問題を深刻化させることがある。
A lack of leadership can sometimes worsen an organization's problems.
その計画は資金の欠如で実行できなかった。
The plan couldn't be implemented due to a shortage of funds.