From Proto-Italic *skreiβō (with scrīptus for *scriptus after scrīpsī), from Proto-Indo-European *(s)kreybʰ-. Cognates include Ancient Greek σκάριφος (skáriphos).
Compare typologically Ancient Greek γράφω (gráphō) < Proto-Indo-European *gerbʰ-; Proto-Germanic *wrītaną (“to scratch, to carve; to engrave, to inscribe, to write”) (whence English write); начерта́ние (načertánije), черти́ть (čertítʹ) << Proto-Indo-European *(s)ker-.