unattainable

Từ điển Oxford Advanced Learner 8th

un·attain·able AW [unattainable] BrE [ˌʌnəˈteɪnəbl] NAmE [ˌʌnəˈteɪnəbl] adjective
impossible to achieve or reach
•an unattainable goal
Opp: ↑attainable

Example Bank:
•Setting unattainable goals will only lead to frustration.

• Từ đồng nghĩa / Synonyms:
  unachievable, undoable, unrealizable