Where does “參” come from?

參 (Chinese) comes from Chinese 三, from Proto-Sino-Tibetan g-sum — three.

Ancestry of “參”, step by step

StepLanguageWordMeaning
1Chinese三three
2Proto-Sino-Tibetang-sumthree
Every word from Proto-Sino-Tibetan g-sum →Every word from Chinese 三 →
參 — Etymology, Origin & Word History | Etymology Explorer