不足

In a sentence

• 睡眠不足のせいで疲れが取れません。

  I cannot get rid of my fatigue due to lack of sleep.

  Here, "不足" indicates a deficiency or lack of something, specifically sleep.

• このプロジェクトを進めるには資金が不足しています。

  We lack funds to proceed with this project.

  In this context, "不足" refers to an insufficient amount of financial resources or funds.

• 最近は運動不足で体調が良くないです。

  Recently, I have not been feeling well due to lack of exercise.

  Here, "不足" signifies a lack or deficiency, in this case, physical activity or exercise.