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Latin word vetus comes from Proto-Indo-European *wēt-, Proto-Indo-European - -os, and later Proto-Indo-European *wétos (Year.)
*wēt- (Proto-Indo-European)
- -os (Proto-Indo-European)
*wétos (Proto-Indo-European)
Year.
*wetos (Proto-Italic)
Year.
vetus (Latin)
Former, previous. Long-standing. Old, aged, ancient.