unattainable

/ˌʌnəˈteɪnəbəl/
adjective
  1. Impossible to achieve, reach, or obtain.
    • She worked hard but felt that perfection was unattainable.
    • The summit seemed unattainable due to the dangerous weather.
    • For many people, owning a private jet is an unattainable dream.
What does "unattainable" mean? | whatsthatwordmean | whatsthatwordmean