Society always drops, creates and re-uses words. But how does that happen? When do we get to decide what word to use, dump, or create, and in what method does that occur? Does someone invent a new word and it spreads, or is there something else going on behind the linguistic scene?
For example, imagine someone invents the word "advertisal". They add it to their mental vocabulary and use it in regular conversations. How do the people who hear this strange new word adapt to it and begin using it in themselves?