penis (English)

Where does "penis" come from?

The word penis stems from the Proto-Indo-European root *pes-, which evolved into the Latin word pēnis, originally meaning both 'tail' and the sexual organ. Entering English as a learned borrowing in the late 17th century, it eventually replaced older Germanic-derived terms like 'pintle' and 'tarse' in formal usage. This shift reflects a broader trend of adopting clinical classical vocabulary over traditional, often colloquial, native terms.

Full etymology tree

• penis (English), 'The male erectile reproductive organ used for sexual intercourse that in the human male and other placental mammals is also used for urination; the tubular portion of the external male genitalia (excluding the scrotum).'
  • borrowed pēnis (Latin), 'tail'
    • inherited *peznis (Proto-Italic)
      • inherited *pes- (Proto-Indo-European), 'penis'
    • inherited *petsnis (Proto-Italic)

Direct ancestors

• pes- (Proto-Indo-European)
• pintle (English)

Updated June 2026

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