expression, suru verb (special), noun-modifying (irregular)
beyond imagination; unimaginable
Used to describe something so extreme, vast, or terrible that it cannot be fully grasped by the mind. Often appears in prenominal form (想像を絶する～) or as a suru verb (想像を絶する).
その光景は想像を絶するほど美しかった。
The scene was beautiful beyond imagination.
彼は想像を絶
He endured unimaginable suffering.