Competent (adjective)

1. Having the necessary ability, knowledge, or skill to do something successfully.
2. Having the legal or official authority to do something.

Origin:

From the latin word "competentem" meaning "suitable" or "fitting".

Examples:

1. He is a competent engineer.
2. She is a competent leader.
3. The company has competent employees.
4. The court found him to be competent to stand trial.
5. The team is competent in handling emergency situations.