unachievable
🇺🇸
/ˌʌnəˈtʃiːvəbl/
🇬🇧
/ˌʌnəˈtʃiːvəbl/
impossible to accomplish or reach
It's unwise to set unachievable goals for yourself.
為自己設定無法達成的目標是愚蠢的。