appallingly

adverb

terrifically/shockingly (in an appalling manner)

L43936 on Wikidata ↗

Wiktionary

Pronunciation: /ʌˈpɑlɪŋli/

adv

Etymology: Etymology tree English appalling Middle English -ly English -ly English appallingly From appalling + -ly.

In an appalling manner.
“She performed appallingly on standard neurological tests, which are, as Sacks perceptively notes, specifically designed to deconstruct the whole person into a stack of 'abilities'.”