cardinal numeral
Analysis. eko + api: 'one' + 'even/also' — a fixed collocation emphasizing singularity or isolation ('even one', 'one alone'), common in negative contexts (na ekopi 'not even one').
Etymology. From PIE *oinos (cf. Latin ūnus, English one, Greek oîos). The form eka- is the stem used before particles; the nominative singular eko shows the -o ending typical of Pali masculines.
Meanings from the Digital Pāḷi Dictionary; morphology and etymology by Claude.
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