Where does “triblus” come from?

triblus (Vulgar Latin) comes from Latin tribulus, from Ancient Greek τρίβολος, from Latin trībulum, from Latin -bulum, from Proto-Indo-European -dʰlom — Alternative form of *-trom; instrumental suffix;...

Ancestry of “triblus”, step by step

StepLanguageWordMeaning
1Latintribuluscaltrop
2Ancient Greekτρίβολοςname of various prickly plants; caltrop, a...
3Latintrībulumthreshing board, threshing sledge
4Latin-bulum
5Proto-Indo-European-dʰlomAlternative form of *-trom; instrumental suffix;...
Every word from Proto-Indo-European -dʰlomEvery word from Latin -bulumEvery word from Latin trībulum