Grey-

Cero is one of the names of the Latin God from Rome. Raw - in Latin - serum and blood, since we are talking about a living substance separated from the body in cases of, for example, infectious diseases. So serum was made from the blood of people with fever. We are talking about therapeutic blood serum. Now we see this word more often in the speech of teenagers, who add it to any word to enhance the effect. When they say about themselves “I am gray,” it means that the person is not interesting, boring or unremarkable. So, based on the meanings, under the influence of colloquial speech, the word “Grey-” was obtained. So why not just say “damp”, but add such a soft and beautiful sound? It can mean some boring, already banal topic that everyone has looked at, discussed and was not satisfied with. Maybe it's the light gloomy gray color that so often speaks of the end of the world? And that's why black T-shirts with the words "No Welcome" are so popular lately?