1st person singular optative of gacchati (from √gam-, 'to go')
Etymology. √gam- (to go, walk, move): cognate with English 'come' (from earlier *gw-), Latin 'venio', Greek 'βαίνω' (bainō). The optative mood expresses potential, wish, or permission.
Meanings from the Digital Pāḷi Dictionary; morphology and etymology by Claude.
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