There is no way to completely avoid communicating. Communication involves gestures, posture, facial expressions and tone of voice. Using all of these things is how we communicate with each other. So even when we are trying to avoid communicating with somebody, we end up communicating with them using either a gesture, posture or facial expression.
Once you say something there is no way to take it back. This is also true with the other forms of communication like gestures, posture and facial expressions. Once you have communicated with somebody, there is no taking back what transpired. As the Russian proverb states "once the word is out of your mouth, you can never swallow it again."
Communication is never simple because of all the variables involved. Theorists say that during communication there are actually six "people" involved. These include; who you think you are; who you think the person you are talking to is; who the person you are talking to thinks you are; who the person you are talking to thinks that they are; who you think the other person you are talking to thinks you are; and who the person you're talking to thinks you think they are. Simply just reading about these six "people" lets you see how complicated communication really is.
There are several different contexts during communication. There is a psychological context which stands for what each person brings to the communication and who they are, such as their needs, values and personality. There is also the relational context which is the reaction that each person has to the other people. Situational context deals with the social aspect of where you are communicating. This says that a conversation at a nightclub would be a very different conversation than one that takes place at church. Environmental context deals with the place that you're communicating, whether it be the classroom or the mall. Cultural context has to do with all the learned rules and behaviors of that person's culture in communication.