indefinite pronoun, locative singular (referring to 'a certain one', 'some one')
Analysis. aña + tara: aña means 'other' or 'different', tara is a comparative suffix denoting selection among alternatives; together 'some one or other of several'
Etymology. aña is cognate with Sanskrit anya, Latin alius, English 'other' — all from Indo-European *al- meaning 'beyond, other'. The -tara suffix marks comparative selection (like Greek -teros in heteros 'the other of two').
Meanings from the Digital Pāḷi Dictionary; morphology and etymology by Claude.
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