Etymology

filamentous

F4I1L1A1M3E1N1T1O1U1S1

Today it means: Thin and elongated; wirelike. Full definition →

Proto-Indo-European *h₃édosder.? ← English filament ← Medieval Latin fīlāmentum
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The story

  1. Proto-Indo-European*gʷʰiH-(s-)lo-
  2. Proto-Italic*fī(s)lom
  3. Latinfīlum
  4. Late Latinfīlō
  5. Medieval Latinfīlāmentum
  6. Englishfilament
  7. Proto-Indo-European*h₃ed-
  8. Proto-Indo-European*h₃édosder.?
  9. English todayfilamentous

From filament + -ous.

Etymology from Wiktionary, CC BY-SA 4.0.