Nausea (Latin nausea, from Greek  - nausia, "ναυτία" - nautia, motion sickness", "feeling sick or queasy") is a sensation of unease and discomfort in the upper stomach with an involuntary urge to vomit. It occasionally precedes vomiting. A person can suffer nausea without vomiting. (Greek ναῦς - naus, "ship"; ναυσία started as meaning "seasickness".) When prolonged, it is a debilitating symptom.