simple (English)

Where does "simple" come from?

The English noun 'simple' was inherited from Middle English 'symple'[1], which was borrowed from Old French and French 'simple'[1], stemming originally from the Latin 'simplex' meaning 'simple' or literally 'onefold'[1]. This Latin source combines 'semel' meaning 'the same' with 'plicō' meaning 'I fold'[1]. Ultimately, the ancestry traces back to Proto-Indo-European roots involving concepts of folding and measurement[4][7]. In its historical journey, this term partially displaced the native English 'onefold'[1].

Open questions

• The first element of Latin simplex does not occur independently in Latin. [4]
• De Vaan reconstructs Proto Italic forms with uncertainty regarding the exact stem suffix. [4]
• The Latin verb plico is considered likely a back formation from compound verbs. [6]

Full etymology tree

• simple (English), 'A herbal preparation made from one plant, as opposed to something made from more than one plant.'
  • inherited symple (Middle English), 'virtuous, godly, without sin:'
    • borrowed simple (French), 'single'
      • inherited simple (Old French), 'innocent'
        • borrowed simplex (Latin), 'single'
          • compound sem- (Latin), 'Prevocalic form of sēmi-'
            • inherited *sem- (Proto-Indo-European), 'together, one'
          • compound -plex (Latin), 'Creates adjectives specifying the number of times, -fold'
            • derived plico (Latin), 'to fold, bend or flex; to roll up'
              • derived *-plek-ā- (Latin)
                • derived *pleḱ- (Proto-Indo-European), 'to fold, plait, weave'
                  • derived *pel- (Proto-Indo-European), 'to cover, to wrap'
  • inherited simple (Middle English), 'alternative form of symple'
    • borrowed simple (French), 'single'
      • inherited simple (Old French), 'innocent'
        • borrowed simplex (Latin), 'single'
          • compound sem- (Latin), 'Prevocalic form of sēmi-'
            • inherited *sem- (Proto-Indo-European), 'together, one'
          • compound -plex (Latin), 'Creates adjectives specifying the number of times, -fold'
            • derived plico (Latin), 'to fold, bend or flex; to roll up'
              • derived *-plek-ā- (Latin)
                • derived *pleḱ- (Proto-Indo-European), 'to fold, plait, weave'
                  • derived *pel- (Proto-Indo-European), 'to cover, to wrap'

Ancestors

• *sem- (Proto-Indo-European)
• symple (Middle English)
• simple (Old French)
• simple (French)
• simplex (Latin)

Sources

1. simple (English) - Wiktionary
2. simple (French) - Wiktionary
3. simple (Old French) - Wiktionary
4. simplex (Latin) - Wiktionary
5. symple (Middle English) - Wiktionary
6. plico (Latin) - Wiktionary
7. semel (Latin) - Wiktionary

Updated August 2026

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