anupalakṣya

 Anupalakṣya (अनुपलक्ष्य) is a Sanskrit adjective meaning “not to be traced” or “imperceptible.”

Etymology and Linguistic Details: The word derives from the prefix ‘an-’ 

(meaning “not”) and the root ‘upalakṣita’, which comes from the 

verb ‘lakṣ’ meaning “to perceive, observe, or note.” Hence, anupalakṣya

literally denotes something that cannot be observed or 

detected

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Grammatical Form: It is a mfn. (masculine, feminine, neuter) adjective,

indicating that it can be applied to nouns of any gender in Sanskrit 

texts

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Usage: The term is used in both Hindu and Buddhist Sanskrit literature 

to describe entities, qualities, or circumstances that are imperceptible, 

untraceable, or undetectable within philosophical or spiritual contexts

Alternate Spellings and Transliteration: In IAST, it can be written as 

Anupalakṣya; alternate spellings include Anupalaksya or 

An-upalakṣya

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In summary, anupalakṣya signifies the quality of being hidden, subtle, 

or beyond perception, often applied in classical literature to describe 

subtle principles, hidden realities, or spiritual truths.