Etymology

seriousness

se·ri·ous·ness
S1E1R1I1O1U1S1N1E1S1S1

Today it means: The state or quality of being serious. Full definition →

English serious ← Middle English seryows ← Old French serieux
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The story

  1. Proto-Indo-European*seh₁-
  2. Proto-Italic*sēros
  3. Latinsērus
  4. Proto-Indo-European*swer-
  5. Proto-Italic*swerjos?
  6. Latinsērius
  7. Proto-Indo-European*h₃ed-
  8. Proto-Indo-European*h₃édosder.?
  9. Medieval Latinsēriōsus
  10. Old Frenchserieux
  11. Middle Englishseryows
  12. Englishserious
  13. English todayseriousness

From serious + -ness.

Etymology from Wiktionary, CC BY-SA 4.0.