1. the quality or state of being futile; uselessness or ineffectiveness

Examples

• The futileness of their efforts became clear when the project was canceled.
• She felt the futileness of arguing with someone who refused to listen.
• The futileness of the search grew as days passed without any sign of the missing hiker.
• He recognized the futileness of trying to change the past.
• The futileness of the protest was evident when no one in power acknowledged it.
• After months of futileness, they finally decided to try a different approach.