Unassuming (adjective)

1. Not pretentious or showy.
2. Modest and humble in nature or behavior.

Origin:

Late 18th century: from un- (expressing negation) + assuming, present participle of assume.

Examples:

1. The unassuming artist's work was celebrated in a major retrospective.
2. The unassuming personality of the new leader won the hearts of the people.
3. The unassuming demeanor of the witness helped to win the jury's trust.
4. The unassuming design of the building blended in with the surrounding architecture.
5. Despite his success, he remained an unassuming person who was always willing to help others.