How to pronounce“witheringly”in English

vetted, directed, shunted into narrower and narrower corridors, leading to smaller and smaller vestibules, where they were commanded to wait in mute distress face-to-face withtheir most closely matched fellow aspirants. Wrestlers here, legacies there, Pakistanis to the right, woodwinds, novelists, witheringly brilliant mathematicians, faculty kids, staffkids, movie star kids, movies stars, ordinary decent kids, good debaters, great debaters,