Found 2 items, similar to sickeningly.
English → English (WordNet) Definition: sickeningly sickeningly adv : in a disgusting manner or to a disgusting degree; “the beggar was disgustingly filthy” [syn: disgustingly, distastefully, revoltingly]
English → English (gcide) Definition: Sickeningly Sickening \Sick"en*ing\, a. Causing sickness; specif., causing surfeit or disgust; nauseating. -- Sick"en*ing*ly, adv. [1913 Webster]