disgust so strong it makes you feel sick
"The smell of rotting fish filled her with such intense nausea that she had to run outside immediately."
A feeling of illness or discomfort in the digestive system, usually characterized by a strong urge to vomit.
"The smell of rotting fish caused me intense nausea and made me rush to find a bathroom."
In plain English: Nausea is that uncomfortable feeling of sickness where you feel like throwing up but haven't actually vomited yet.
"The smell of rotten eggs caused me to feel overwhelming nausea in my stomach."
Usage: Do not confuse this noun with the verb nauseate, which means to cause such feelings; instead, use the adjective nauseous only when describing something that induces sickness, as it is often misused to describe the sensation itself. Avoid using "nausea" as a plural noun or modifying other words directly without an article (e.g., say "feelings of nausea," not "nausea feelings").
From Middle English nausea, a borrowing from Latin nausea, from Ancient Greek ναυσία (nausía, "sea-sickness"), from ναῦς (naûs, "ship"), from Proto-Indo-European *(s)neh₂-. Displaced native Old English wlǣtta.