IPA: /nɔːˈzeɪtɪŋli/
KK: /ˈnɔːzɪˌeɪtɪŋli/
In a way that causes a feeling of sickness or disgust.
The smell of the rotten food was nauseatingly strong.
Nauseatingly → It is formed from "nauseate" (from Latin "nauseare", meaning to feel seasick or to cause nausea) and the suffix "-ingly" (meaning in a manner of). The word "nauseatingly" describes something that causes a feeling of nausea in a manner that is intense or overwhelming.
Think of feeling seasick ('nauseate') and how something can make you feel that way 'intensely' ('-ingly'). This helps you remember that 'nauseatingly' means in a way that causes strong feelings of sickness.
No commonly confused words.