nt instr sg of udaka (noun); masc instr sg of udaka (adj); nt instr sg of udaka (adj); masc instr sg of udaka (noun)
Etymology. From the root √ud (to rise up, flow out) + the nominal suffix -aka. The sense 'water' is naturally derived from the image of rising or flowing liquid; compare Sanskrit udaka and the cognate English 'udal' (a form of Orkney land tenure involving water rights). The prefix ud- (up, out) appears in ud-gacchati 'rises' and ud-dharati 'lifts', preserving the concrete sense of upward motion and emergence.
Meanings from the Digital Pāḷi Dictionary; morphology and etymology by Claude.
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