What are 2-4 specific examples of this lexis and what do they mean?

A discourse community uses a specific lexis.
This refers to the jargon specific and unique to a community, It is actually required by the members of that community for intercommunication. Artists, for example, have a specific lexis used to explain tools, techniques, and mediums. Biologists use a different lexis from Marine Biologists, but each community has its own lexis.
1) Start this exercise by writing a single clear topic sentence about the lexis used in your chosen community.
2) Why is it important within this discourse community?
3) What are 2-4 specific examples of this lexis and what do they mean?
4) How does this community practice intertextuality (communicating with those outside your group)?

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