[Advaita-l] Please clarify some terms for me.

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Pranams to all of you who have the patience and grace to share your knowledge.
Thank you.
I need some clarity of certain terms as they seem to be interchangeable or simply have many names..
The other problem is English terms are used that confuses the issue more.
I prefer we stick with Sanskrit terms.
This is is reference to Drg Drshya Viveka
Sakshi. - is this the same as Consciousness. 
Chitih. - is the same as Sakshi?
Chicchaya - reflection of chit?
Chit Chaitanya - Is the same as Chichaya? Reflection Chit?
Atma I same as Sakshi?
Atma in microcosm, Brhamam in Macrocosm? 
Is Vishepa in reference to World?
Avarna in relation to Mind?
My apologies for being so reductive.
Soma