What is a common synonym for the word "nauseous"?

The choice of "repulsive" as a synonym for "nauseous" is accurate because both terms convey a sense of extreme discomfort or aversion. "Nauseous" typically describes a feeling that often precedes vomiting, characterized by an overwhelming sense of sickness or queasiness. This feeling can be accompanied by disgust or a strong dislike, akin to what the word "repulsive" evokes, which also suggests something that is highly distasteful or offensive.

In contrast, the other options present meanings that do not align with the discomfort associated with "nauseous." "Refreshing," "invigorating," and "pleasing" all connote positive experiences or sensations, which are opposite to the feelings evoked by being nauseated. Therefore, "repulsive" stands out as the term that best captures the essence of what it means to feel nauseous.