Etymology

underbalanced

U1N1D2E1R1B3A1L1A1N1C3E1D2

Today it means: Describing a method of drilling for petroleum in which the pressure in the wellbore is kept lower than that of the formation being drilled, thus allowing fluid to enter the well as soon as it is found. Full definition →

English balanced ← Middle English under- ← Old English under-
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The story

  1. Proto-Indo-European*h₁én
  2. Proto-Indo-European*h₁entér
  3. Proto-Indo-European*h₂én
  4. Proto-Indo-European*dʰeh₁-?
  5. Proto-Indo-European*(H)n̥dʰí
  6. Proto-Indo-European*(H)n̥dʰér
  7. Proto-Germanic*under
  8. Proto-West Germanic*undar
  9. Old Englishunder-
  10. Middle Englishunder-
  11. Englishunder-
  12. Englishbalanced
  13. English todayunderbalanced

From under- + balanced.

Etymology from Wiktionary, CC BY-SA 4.0.