[Lt_Apple]

Badri, looks like u are well versed with sanskrit, and hence can stand to clarify any doubts if arising.
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na (न) - No/Not
antah (अन्तः) - Inside/Inner/Internal
pragyam (प्रज्ञम्) - Knowable/Acquaintable/Knowing
bahis (बहिस्) - Outside/Outward/Outer/Excluded/External
ubhayatah (उभयतः) - On both side/In both cases
pragyaan (प्रज्ञान) - Cognisance/Knowing
ghanam/ghana (घनम्/घन) - Dense/Dark/Solid/Hard
apragyam (अप्रज्ञम्) - a (अ) + pragyam (प्रज्ञम्) - Non-knowable/Non-knowing - Unknowable
adrishhtam (अदृष्टम्) - a (अ) + drishhtam (दृष्टम्) - Non-seeable/Non-viewable - Invisible
avyavahaaryam (अव्यवहार्यम्) - a (अ) + vyavahaaryam (व्यवहार्यम्) - Non-actionable/Non-interact-able.
agraahyam (अग्राह्यम्) - a (अ) + graahyam (ग्राह्यम्) - Non-grasp-able/Non-comprehensible - Imperceptible/Incomprehensible
alakshanam (अलक्षणम्) - a (अ) + lakshanam (लक्षणम्) - Non-characteristic - Not having any characteristics.
achintyam (अचिन्त्यम्) - a (अ) + chintyam (चिन्त्यम्) - Non-reflection-able/Non-thinkable - Inconceivable
avyapadeshyam (अव्यपदेश्यम्) - a (अ) + vyapadeshyam (व्यपदेश्यम्) - Non-mentionable
ekaatma (एकात्म) - eka (एक) + aatma (आत्म) - Single self
pratyaya (प्रत्यय) - Conception/Conviction/Notion/Idea
saaram (सारम्) - Substance/Quintessence
pra (प्र) - To/"used as prefix"
pancha (पञ्च) - Five
upashamam (उपशमम्) - Cessation/Abatement/Extinction/Calmness
shaantam (शान्तम्) - Peaceful
shivam (शिवम्) - Auspicious/Kind/Friendly/Gracious/Happy
advaitam (अद्वैतम्) - a (अ) + dvaitam (द्वैतम्) - Non-dual
chaturtham (चतुर्थम्) - Fourth
manyante (मन्यन्ते) - Deem/View as
sah (सः) - He
aatmaa (आत्मा) - Self/Soul/Spirit
vigyeyah (विज्ञेयः) - To be known


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This is something I got from a website.

Shivam - explanation is given as auspicious(as said by u too), kind, gracious etc.

I have a doubt if Shiva also means STATIC?

Also,

pra (प्र) - To/"used as prefix"
pancha (पञ्च) - Five
upashamam (उपशमम्) - Cessation/Abatement/Extinction/Calmness

states CESSATION of prapancha. Since prapancha is nothing but pancha bootha in its various proportions, its nothing but CESSATION of external world

cessation here DOES NOT MEAN NON-EXISTING. but rightly may be comprehended as exalted in state ?

But then THIS TURYAM IS NOT A STATE at all!
its transcends all states too Its JUST BEING.

As rightly the verse says...

TRUTH cannot be KNOWN... but it is not that
IT IS NOT-KNOWN too.

It is something which KNOWN yet NOT-KNOWN (not-known is not UNKNOWN here! )