accusative singular masculine of aññatara (indefinite pronoun/adjective)
Analysis. a-ññatara: negation prefix a- + ññatara (from na-itara, "not-the-other"), literally "not the other one", hence "one of two; one or another; some"
Etymology. Built from the negation a- (without) and ññatara, which derives from na (not) + itara (the other, different). The logic is: "not the other one" = "this one (as opposed to that)"; used to mark indefinite selection. The itara- root relates to Sanskrit itara- (other, different).
Meanings from the Digital Pāḷi Dictionary; morphology and etymology by Claude.
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