skull
UK[skʌl]US[skʌl]
n
the bone structure that forms the head and surrounds and protects the brain.
n
the head or mind, especially regarded as the seat of intelligence or thought.
Etymology
the word 'skull' entered english in the 13th century from middle english skulle, which itself was borrowed from old norse skalli, meaning 'bald head' or 'skull'. this norse term is likely related to old english scealu, meaning 'husk' or 'shell', a connection that vividly illustrates the conceptual view of the skull as a protective casing for the brain. the ultimate proto-indo-european root is likely (s)kel-, meaning 'to cut' or 'to cleave', which also gave rise to words like 'shell' and 'scale', reinforcing the idea of a hard, separable covering. the semantic journey from a general 'shell' to the specific bony structure of the head demonstrates a classic pattern of semantic narrowing.
Analysis
the word 'skull' is a simplex word of scandinavian origin (middle english skulle). it does not contain separable morphemes in modern english.
Examples
the archaeologists discovered an ancient human skull at the burial site.
he fractured his skull in the accident but made a full recovery.
i can't get that catchy tune out of my skull.