叶かなわぬ

noun-modifying (irregular)

impossible; unfulfillable; unrequited; hopeless

Used prenominally to describe dreams, wishes, or love that cannot come true. Often carries a poetic or resigned tone.

• それは叶かなわぬ夢ゆめだと分わかっていた。

  I knew it was an impossible dream.

• 叶かなわぬ恋こいに悩なやむ日ひ々びが続つづいた。

  Days of suffering from unrequited love continued.