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Asbestos

/æsˈbɛstɒs/noun

A fibrous silicate mineral once used for fireproofing and now known to cause fatal lung disease.

The Greek roots

ἄ-
a-
not, without
+
σβεστός
sbestós
quenched, extinguished

Literally: unquenchable

The story of the word

Ἄσβεστος means inextinguishable and the Greeks used it of unquenchable fire, not of a rock. Ancient writers describe a stone cloth that could be cleaned by throwing it into flames, but they called it λίθος ἀμίαντος, the undefiled stone. Pliny appears to have muddled the two terms, and the mistranslation stuck for two thousand years.

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

Same family

asbestosis

In a sentence

The survey found asbestos in the boiler room lagging, so the school closed for a term.

Built on the same root

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