underachievement

/ˌʌndərəˈtʃivmənt/
noun
  1. The act or state of performing less well than expected or than one is capable of, especially in school or work.
    • The teacher was concerned about the student's underachievement despite his high test scores.
    • The program aims to reduce underachievement among gifted students.
    • Her underachievement at work was due to a lack of motivation, not ability.
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