Etymology

unreactivity

U1N1R1E1A1C3T1I1V4I1T1Y4

Today it means: The condition of being unreactive; inertness Full definition →

English reactivity ← Middle English un- ← Old English un-
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The story

  1. Proto-Indo-European*né
  2. Proto-Indo-European*n̥-
  3. Proto-Germanic*un-
  4. Proto-West Germanic*un-
  5. Old Englishun-
  6. Middle Englishun-
  7. Englishun-
  8. Englishreactivity
  9. English todayunreactivity

From un- + reactivity.

Etymology from Wiktionary, CC BY-SA 4.0.