εἷς (Ancient Greek)
Where does "εἷς" come from?
The Ancient Greek word 'εἷς' (heis), meaning 'one,' traces its roots back to the Proto-Indo-European root '*sem-'. This ancient concept of oneness evolved through Proto-Hellenic into 'hens' before settling into its Greek form. It shares common ancestral roots with widespread terms like the Latin 'semper', illustrating how the fundamental idea of unity has persisted and branched out across Indo-European languages.
Full etymology tree
- εἷς (heîs) (Ancient Greek), 'one'
- inherited *hens (Proto-Hellenic), 'one'
- inherited *séms (Proto-Hellenic)
- inherited *sḗm (Proto-Indo-European), 'one'
- derived *sem- (Proto-Indo-European), 'together, one'
- inherited *sḗm (Proto-Indo-European), 'one'
- inherited *séms (Proto-Hellenic)
- inherited *hens (Proto-Hellenic), 'one'
Ancestors
- *sem- (Proto-Indo-European)
- *hens (Proto-Hellenic)
- *sḗm (Proto-Indo-European)
Cognates and doublets
- semper (Latin)
- सकृत् (Sanskrit)
Updated July 2026
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Etymology data from Wiktionary, CC BY-SA 4.0 · About Miraris