efficaciousness (noun)

1. Through prayer and faith, believers seek the efficaciousness of divine intervention in their lives.

2. The director skillfully portrays the efficaciousness of love as it transforms the lives of the main characters.

3. The painting captures the emotional efficaciousness of nature's beauty on the viewer.

4. In the science fiction novel, the author explores the efficaciousness of technology in creating a dystopian society.