Perhaps the most likely one is that it comes from the Indo-European root *(s)kwer, meaning "steep". If so, the same root is seen in Scardona (the ancient name for Skradin) and Cersia (the ancient name for Cres).
The likely origin of this word is tied to the Indo-European root *(s)kwer, signifying a steep incline. This root also appears in the ancient names Scardona (for Skradin) and Cersia (for Cres).