From Proto-Italic *deksteros, from Proto-Indo-European *deḱs-tero-s, from *deḱs- (“right”). Cognate with Ancient Greek δεξιτερός (dexiterós), and compare δεξιός (dexiós), Old High German zesawa (“right hand, right hand side”), Sanskrit दक्षिण (dákṣiṇa), Old Church Slavonic деснъ (desnŭ, “right”).