Probably because for the most part, we use exoteric English; however, if we all started to use our colloquial dialects of English (esoteric), most people would be confused.
Even with exoteric language, the meaning can still be warped on a forum because any emotional weight that strengthens the context relies purely on the receiver's assumptions (that includes using emoticons).
Indisposable whilst not an official* word, actually has meaning: not disposable. Supercalifragilisticexpialidocious on the other hand, is an officially accepted word that has no real meaning.
TA said that if loads of people use a word incorrectly, the meaning of that word never changes. What about the word egregious? It's used these days to mean "outstandingly bad", but it used to mean something was "remarkably good". I doubt anyone today would take egregious to mean something positive.
*TA mocks me for this when he is in fact doing the same thing, only using synonyms to justify his point.
But a neologism isn't the same thing as the example you used with 'egregious'. An example used wrongly. When I do a simple search using my translator gadget in my browser it will state there that the word describes a state of emphasis if you will.
I think it is necessary for language to evolve, to be uprooted as you said. It must evolve to be able to convey new meaning and ideas, stagnant language limits progression.
Therefore, new words must sometimes be invented and accepted and then used commonly. You see, the world is made of language.
Language is the means by which we convey thoughts, and they are a function of consciousness. It is our consciousness that perceives reality and so what we do is we perceive information. This information reaches us through our senses and it contains, or rather is made of continuously changing states of reality. Every object we see changes all the time. That is Heisenberg's uncertainty principle at work, it is impossible to measure a state of being because when you do, your act of measurement changes that state.
So any object discerned is a flow of information because to behold it is to take in its continually changing state. So objects flow on a carrier wave of light into our eyes, or reach us using other carriers to enter other senses.
So language can never be stagnant because to convey anything about an object means to give an observation of a changing state, compare a film, taking one frame of it and then describing it. A word or definition describes one frame of an object that flows in space and time.
After all, the object was there a second ago, it is there now and it probably will be there one second from now.
So language has a temporal aspect because any state is temporary when defined in language. So that is why you can say that reality is made up of language. It is a description of reality that we take to be all-defining, but it is only a frame of a film and valid in the extreme moment.
If the state of an object changes, we perceive other information from it and so our language must be able to reflect these state changes. Otherwise reality would be forever transfixed, the wave function collapsed.
