The term bad can be used as an adjective or as a noun. In the first case, it is used before a singular masculine noun to qualify it as bad or negative.
For example: "It seems to me that it is a bad plan, we better think something else" , "Your cousin is a bad guy, I am not interested in knowing anything about him" , "I am tired of the bad service of this telephone company: I am going to change my operator as soon as possible ” .
As a noun, the idea of evil alludes to that which is opposite to good. Evil, therefore, is a departure from honesty and legality: “I already explained to my son that it is wrong to act that way” , “I think Sergio was wrong, but you should forgive him” , “The president considers that the deputies misbehaved by refusing to debate ” .
The injury, injury or damage that is done or received can also be named as wrong: "Roxana's words did me a lot of harm" , "I don't want to do you wrong, but I ask you please to leave" , "The The evil that mining activity caused in this region can never be repaired ” .
In the field of medicine, a disease, a disorder or a disease is misnamed. The Alzheimer's disease, to cite one case, a neurodegenerative disease, the death of neurons and brain regions atrophy, causes a progressive loss of cognitive abilities and memory. The Chagas disease and Parkinson 's disease are other problems that can affect health.