fem nom sg of ratti (noun); fem voc sg of ratti (noun)
Etymology. From Proto-Indo-European *h₂reǵ- 'darkness, night'; cognate with Sanskrit rātri, Latin ater (dark), and Greek orthros (dawn, darkness). The root sense is 'covering darkness'; the -tti ending is a feminine derivative formation.
Meanings from the Digital Pāḷi Dictionary; morphology and etymology by Claude.
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