The story
- Proto-Indo-European*mel-
- Proto-Indo-European*ml̥tós?
- Proto-Italic*moltos
- Latinmultus
- Latinmultī
- Middle Englishmulti-
- Englishmulti-
- Proto-Indo-European*gʷʰiH-(s-)lo-
- Proto-Italic*fī(s)lom
- Latinfīlum
- Late Latinfīlō
- Medieval Latinfīlāmentum
- Englishfilament
- Proto-Indo-European*h₃ed-
- Proto-Indo-European*h₃édosder.?
- Englishfilamentous
- English todaymultifilamentous
From multi- + filamentous.
Etymology from Wiktionary, CC BY-SA 4.0.