ind.
Analysis. aña (other) + da (particle of uncertainty) + tthu (emphatic particle); a compressed adversative or concessive phrase meaning 'other [possibility] it may be', hence 'at any rate, however'.
Etymology. aña- (other, different; < *anya-, cognate with Sanskrit anya, Greek ἄλλος allos) + da (uncertain particle, < *da, a marker of doubt or conditionality) + tthu (emphatic particle reinforcing the sense). The spatial logic is inverted: rather than pointing to what is, it gestures toward an alternative—'the other'—rendering it a counterpoint or concession.
Meanings from the Digital Pāḷi Dictionary; morphology and etymology by Claude.
Lite mode — plain HTML for e-readers and old browsers. Full version