Nauseous. Nauseated. The first means "sickening to contemplate"; the second means "sick at the stomach." Do not, therefore, say "I feel nauseous," unless you are sure you have that effect on others.
E. B. WhiteWilbur burst into tears. "I dont want to die," he moaned. "I want to stay alive, right here in my comfortable manure pile with all my friends. I want to breathe the beautiful air and lie in the beautiful sun."
E. B. White