What is the use of words in which sounds imitate or suggest their meaning?

Can someone give me the main topics discussed in english segment 2 dba ( lesson 3.09 )

Explain what john proctor meant here! then who will judge me? god in heaven, what is john proctor what is john proctor? i think it is honest, i think so, i am no saint let rebecca go like a "

How is theme of loneliness developed in chapter 4? thinking about the characters lennie,crooks,candy,and curley's wife