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Endemic

/ɛnˈdɛmɪk/adjective

Permanently present in a particular place or population.

The Greek roots

ἐν
en
in, among
+
δῆμος
dêmos
people, district

Literally: in the people

The story of the word

Hippocratic writers separated the diseases that sit permanently in a district from those that arrive and sweep through, and the pair survives in English as endemic and epidemic — one is in the people, the other upon them. English took endemic from French in the 1660s, medical from the start. Biologists later borrowed it for a species found in one place and nowhere else, which is why Australia is described as having endemic mammals rather than endemic measles.

How it travelled
Ancient Greek → Latin → French → English
First recorded
1660s

Same family

epidemicpandemicdemocracydemagoguedemotic

In a sentence

Malaria is endemic across much of the region.

Nine of the island's plants are endemic and grow nowhere else on earth.

Built on the same root

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