overachievement

/ˌoʊvərəˈtʃivmənt/
noun
  1. The act or result of performing better or achieving more than is expected.
    • Her overachievement in school earned her a full scholarship to college.
    • The team's overachievement surprised everyone, as they were predicted to finish last.
    • Some people worry that constant overachievement can lead to burnout.
What does "overachievement" mean? | whatsthatwordmean | whatsthatwordmean