1st person singular nominative pronoun + emphatic particle
Analysis. ahaṃ (I) + hi (emphatic particle meaning 'indeed, truly'). The particle hi reinforces the pronoun, marking emphasis or contrast in the utterance.
Etymology. ahaṃ derives from Indo-European *eg-, the first-person singular pronoun seen in English 'I' and Latin 'ego'. The particle hi comes from *ghe, an emphatic/assertive particle found in Greek gē (indeed) and related to the Latin emphatic -ce. Together they form a marked, emphatic assertion of the subject.
Meanings from the Digital Pāḷi Dictionary; morphology and etymology by Claude.
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