The story
- Proto-Indo-European*tréyes
- Proto-Indo-European*tri-
- Proto-Italic*tri-
- Latintri-
- Englishtri-
- Proto-Indo-European*dwóh₁
- Proto-Indo-European*trísinflu.
- Proto-Indo-European*d(w)is-
- Proto-Italic*dis-
- Latindis-
- Proto-Indo-European*med-
- Proto-Indo-European*meh₁-
- Proto-Italic*mētis
- Latinmētior
- Latindīmētior
- Latindīmēnsiō
- Englishdimension
- Proto-Indo-European*h₂el-
- Proto-Indo-European*h₂élisder.?
- Englishdimensional
- English todaytridimensional
From tri- + dimensional.
Etymology from Wiktionary, CC BY-SA 4.0.