basalt (English)

Where does "basalt" come from?

The English noun 'basalt' traces its roots through Late Latin 'basaltes', which was a misspelling of the Latin word 'basanites'[1]. This Latin term derived from Ancient Greek 'βασανίτης'[1], meaning 'basanítēs'[1], formed from 'βάσανος'[2] meaning 'básanos'[1] or 'touchstone'[1]. Ultimately, this ancient chain reaches back to the Egyptian word 'bḫn'[1], translating to 'a hard stone'[1], possibly passing through Lydia[3] where the material served as a touchstone for gold[3].

Open questions

The path from Egyptian bḫn through Lydia to Ancient Greek remains a reconstructed proposal. [3]

Full etymology tree

basalt (English), 'A hard mafic igneous rock of varied mineral content; volcanic in origin, which makes up much of the Earth's oceanic crust.'
- inherited basaltes (Late Latin)
  - inherited basanites (Latin)
    - borrowed βασανίτης (basanítēs) (Ancient Greek), 'synonym of βάσανος (básanos, “touchstone”)'
      - derived βάσανος (básanos) (Ancient Greek), 'gold touchstone (stone which is rubbed on gold to ascertain its authenticity by leaving a yellow streak)'
        borrowed (Lydian)
        borrowed bhn (Egyptian), 'a kind of article of clothing. The meaning of this term is uncertain.'
      - suffix -ίτης (-ítēs) (Ancient Greek), 'Suffix forming a masculine noun: one connected to, a member of; one from a particular place (demonym)'

Ancestors

βασανίτης (Ancient Greek)
bhn (Egyptian)

Descendants and derived words

alkali basalt (English)
basaltic (English)
basaltiform (English)
basaltine (English)
basaltoid (English)
basaltoid (English)
basaltware (English)
metabasalt (English)
metabasaltic (English)
nonbasalt (English)
picrobasalt (English)
plateau basalt (English)

Related words

volcano (English)

Sources

Updated October 2026

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Etymology data from Wiktionary, CC BY-SA 4.0 · About Miraris