The story
- Proto-Indo-European*tréyes
- Proto-Indo-European*tri-
- Proto-Italic*tri-
- Latintri-
- Englishtri-
- Proto-Indo-European*kh₂em-
- Proto-Indo-Iranian*kmárati
- Proto-Iranian*kamarā
- Ancient Greekκαμάρα (kamára)
- Latincamera
- Proto-Indo-European*h₂el-
- Proto-Indo-European*h₂élisder.?
- Englishtricameral
- English todaytricameralism
From tricameral + -ism.
Etymology from Wiktionary, CC BY-SA 4.0.