sick·en·ing 
/ˈsɪkənɪŋ/ adjective
/ˈsɪkənɪŋ/ adjective [more sickening; most sickening] 1 : causing you to feel sick
▪ a sickening [=nauseating] odor/stench ▪ We had reached a sickening [=dizzying] height. 2 : causing a strong feeling of disgust
▪ a sickening display of selfishness ▪ sickening cruelty 3 of a sound : causing great concern especially because someone or something may have been badly harmed
▪ We heard the squeal of brakes and a sickening thud/crash.
▪ a sickening [=nauseating] odor/stench ▪ We had reached a sickening [=dizzying] height.
▪ a sickening display of selfishness ▪ sickening cruelty
▪ We heard the squeal of brakes and a sickening thud/crash.
— sick·en·ing·ly adverb
▪ The cake was sickeningly sweet. ▪ a sickeningly familiar pattern of behavior
▪ The cake was sickeningly sweet. ▪ a sickeningly familiar pattern of behavior
