accusative singular neuter of aññatthatta (noun)
Analysis. aññatha (adverbial form of aña, 'other') + -tta (suffix forming abstract nouns from adjectives and adverbs, like -ness in English) + -ṁ (accusative ending); literally 'state of being other' or 'quality of otherness'
Etymology. From aña 'other' (cognate with Sanskrit anya, from PIE *al- 'other, beyond'; related to English 'else' and 'alien'). The suffix -tta derives abstract qualities as -ness does in English. In early Buddhist doctrine, aññatthatta denotes the falsely perceived permanent nature (sabhāva) that is actually absent—a key error in misunderstanding anattā (non-self).
Meanings from the Digital Pāḷi Dictionary; morphology and etymology by Claude.
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