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Sciatica

/saɪˈætɪkə/noun

Pain running from the lower back down the leg along the sciatic nerve.

The Greek roots

ἰσχίον
iskhíon
hip joint, hip socket
+
ἰσχιαδικός
iskhiadikós
afflicted in the hip

Literally: of the hip

The story of the word

The Greek adjective meant afflicted in the hip, which is where the ancients located the trouble. Latin ischiadicus lost its opening syllable in ordinary speech and came out as sciaticus, so the English word ended up looking nothing like ischium, the hip bone that anatomy borrowed later and spelled properly. Both are the same Greek noun, arriving by different roads. The pain itself is usually a disc pressing on a nerve root well above the hip, so the name blames the wrong place.

How it travelled
Ancient Greek → Latin → Old French → English
First recorded
14th century

Same family

ischiumischialischiatic

In a sentence

Three weeks of sciatica and he was sleeping on the floor with his knees up on a chair.

Built on the same root

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