Overambitious (adjective)

Having aspirations or goals that are too high or unrealistic.

Origin:

The word overambitious is a combination of the prefix "over" meaning "more than necessary" and the adjective "ambitious", meaning "having a strong desire for success or achievement", it first recorded use in english is from the early 18th century.

Examples:

1. The project was deemed overambitious and had to be scaled back.
2. He was criticized for being overambitious in his approach to the job.
3. The company's plan was overambitious, and it ultimately failed.
4. She was overambitious in her approach to school, trying to take on too many classes.
5. He was overambitious in his goals, which led to disappointment and frustration.