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Encephalitis

/ɛnˌsɛfəˈlaɪtɪs/noun

Inflammation of the brain, usually caused by viral infection or by the immune system attacking brain tissue.

The Greek roots

ἐν
en
in, within
+
κεφαλή
kephalḗ
head
+
-ῖτις
-îtis
inflammation of

Literally: inflammation of what is in the head

The story of the word

Greek had no simple noun for the brain. It called the organ ἐγκέφαλος, 'the thing in the head', naming it by address rather than by function, and that phrase is what sits inside this word. Between 1917 and 1928 an epidemic of encephalitis lethargica left survivors frozen for decades, the patients Oliver Sacks wrote about in Awakenings. The cause was never established.

How it travelled
Ancient Greek → medical Latin → English
First recorded
19th century

Same family

encephalogramcephalichydrocephalusmeningitis

In a sentence

The scan and the lumbar puncture together pointed to viral encephalitis.

Built on the same root

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