'skull-related' originates from the English word 'skull' combined with the suffix '-related', indicating association or connection.

The term 'skull' has been used in English since the late Middle Ages, derived from the Old Norse word 'skalli', meaning 'bald' or 'bare'. The suffix '-related' is a common English formation to denote association.

Initially, 'skull' referred to the bony structure of the head, and 'related' indicated connection. The combined term 'skull-related' maintains this meaning of association with the skull.