capitalis (Latin)

Where does "capitalis" come from?

The Latin adjective 'capitalis' is formed from 'caput', meaning 'head', combined with the suffix '-ālis'[1]. The root 'caput' traces back through Proto-Italic '*kaput'[2] to Proto-Indo-European '*káput'[3]. The underlying Proto-Indo-European root is '*kap-', which may mean 'seize' or 'hold'[3], though some linguists propose it could be a non-Indo-European loanword or sound-symbolic origin[4][5]. In Latin, 'capitalis' originally carried meanings relating to the head or life, as well as being dangerous or deadly, and excellent.

Open questions

• The Proto-Indo-European root '*kap-' is possibly of substrate origin or sound-symbolic. [4] [5]
• The form '*káput' may derive from '*kap-' meaning seize or hold. [3]

Full etymology tree

• capitalis (Latin), 'of the head or life'
  • derived caput (Latin), 'The head. (of human and animals)'
    • inherited *kaput (Proto-Italic), 'head'
      • inherited *káput (Proto-Indo-European), 'head'
        • derived *kap- (Proto-Indo-European), 'head'
  • suffix -alis (Latin), 'Suffixed to nouns or numerals creating adjectives of relationship.'

Ancestors

• caput (Latin)
• -alis (Latin)

Sources

1. capitalis (Latin) - Wiktionary
2. caput (Latin) - Wiktionary
3. kaput (Proto-Italic) - Wiktionary
4. káput (Proto-Indo-European) - Wiktionary
5. kap- (Proto-Indo-European) - Wiktionary

Updated August 2026

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