insufficient (adjective)

1. The painting lacked depth and dimension, making it insufficient in capturing the true essence of the subject.

2. In Greek mythology, Tantalus was punished by being surrounded with water and fruit trees, which were always just out of reach, leaving him insufficient in satisfying his hunger and thirst.

3. During the Great Depression, the government's relief efforts proved insufficient in providing enough jobs and stabilizing the economy.

4. The short story had an insufficient plot development, leaving the readers longing for more depth and substance.