adverb and first-person singular nominative pronoun, a scribal or metrical fusion of tathā + ahaṁ, attested as a surface form in verse
Analysis. tathā (thus, in this manner) + ahaṁ (I, nominative); a contraction found in metrical contexts where two words are fused without full sandhi assimilation, preserving both elements.
Etymology. tathā derives from the deictic root *ta- (that, this) with the adverbial suffix -thā (manner); ahaṁ is the first-person pronoun from PIE *ego-, cognate with English I, Latin ego, Greek ego. The fusion is a metrical convenience rather than a true compound.
Meanings from the Digital Pāḷi Dictionary; morphology and etymology by Claude.
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