Where does “trisulphate” come from?

trisulphate (English) comes from English tri, from Proto-Indo-European tréyes — three.

Ancestry of “trisulphate”, step by step

trisulphate traces back through two separate lines of ancestry.

via English tri

StepLanguageWordMeaning
1Englishtritriathlon; triangle
2Proto-Indo-Europeantréyesthree

via English sulphate

StepLanguageWordMeaning
1EnglishsulphateAlternative spelling of sulfate
Every word from Proto-Indo-European tréyes →Every word from English tri →
trisulphate — Etymology, Origin & Word History | Etymology Explorer