Underachieve (verb)

1. To perform or achieve less than expected or desired.
2. To fail to reach one's potential.

Origin:

Mid 20th century: blend of under- and achieve.

Examples:

1. Despite his intelligence, he underachieved in school.
2. The team underachieved this season, failing to make the playoffs.
3. He underachieved in his career due to a lack of motivation.
4. The company underachieved in its sales goals.
5. The student underachieved on her exam despite studying hard.