towering; astonishingly high
Describes something so tall or high that one must look up at it; often used figuratively for impressive scale or degree.
That building is toweringly tall.
His achievements are astonishingly great.
Standard kanji spelling for this phrase.
Alternate kanji spelling using 様 for よう; less common but acceptable.
From the verb 見上げる (to look up) + よう (appearing, seeming), literally 'appearing as if one must look up'.