It often is sufficient to recover earlier meanings of common words. It always means that we will put common words together in new ways. To make a change in a social group, the group needs to change the way that it talks about things. It is the complex interactions of words, put together in different ways, that allow us to create an infinite variety of meaning. Finding these combinations is an essence of the art of change.
Ordinary language performs an incredibly powerful function in a social organism.
It keeps the continuity of past and identity in place. To change this order of things cannot occur within what is experience to be ordinary language. Yet some have developed the art of making such new, change generating language sound ordinary.