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Latin word -sco comes from Proto-Indo-European *-sḱéti (Forms durative or iterative imperfective verbs from roots.)
*-sḱéti (Proto-Indo-European)
Forms durative or iterative imperfective verbs from roots.
*-skō (Proto-Italic)
-sco (Latin)
Forms inchoative verbs from existing verbs, meaning "to start to (verb), to begin to (verb)".