Depending on the context in which we use the word bad, it may refer various questions ...
TO that which lacks goodness and other positive qualities We popularly call it bad. Juan is very bad, he cannot treat you that way with so many good things that you have done for him in all these years together.
Also, bad, it involves that which is opposed to reason or morality. A bad deed, a bad reply.
Another use of the word allows us to account for one who leads a bad life or has bad habits. I told you hundreds of times not to hang out with Laura, she's a bad woman, we all know it..
Also, when someone is naughty or entangling is often called bad. He is such a bad child that I cannot leave him for two minutes alone, as soon as I stop looking at him he breaks something.
On the other hand, to what turns out to be harmful to health or harmful in any of its aspects it is usually described as bad. Drinking excessively is bad: smoking is very bad, you should try to quit smoking.
In some Spanish-speaking regions, the word malo is often used to talk about someone who is sick or unwell. Yesterday I did not run away to work because I felt really bad, today I go to the doctor without fail.
When something deteriorates, spoils or spoils it is said that it gets bad. The oranges I bought yesterday went bad right away.
Other frequent uses of the term allow us to account for that which presents a poor quality or poor quality (these shoes came out pretty bad for me); when something has very little usefulness, effectiveness or ability (I must admit that if I am bad at something, it is with numbers).
On the other hand, when something is difficult, or failing that, presents difficulties It is common for us to use the term bad to refer to it. My sister is going through a very bad financial situation, that's why we are helping her with my parents.
That which is unpleasant, that does not like, does not satisfy, annoying, unpleasant, wrong or with unpleasant consequences we usually call it bad. Spielberg's new movie is very bad. The purchase of the piano was a bad decision.
Meanwhile, there are widely used expressions that contain the word bad, such as being: to bad (with enmity), bad (disgust, does not present a good mood), put bad (irritate, annoy, annoy) and the hard way (something achieved by force).