Where does “caldrist” come from?

caldrist (Welsh) comes from Welsh trist, from Middle Welsh trist, from Old Welsh trist, from Proto-Brythonic *trist, from Latin trīstis, from Proto-Indo-European tristh₂s, from Proto-Indo-European steh₂- — to stand.

caldrist (Welsh): helleborine, dog-stones, orchids mostly of genera Epipactis and Cephalanthera

Definitions

helleborine, dog-stones, orchids mostly of genera Epipactis and Cephalanthera

Ancestry of “caldrist”, step by step

Step	Language	Word	Meaning
1	Welsh	trist	sad
2	Middle Welsh	trist	—
3	Old Welsh	trist	—
4	Proto-Brythonic	*trist	—
5	Latin	trīstis	sad, unhappy, melancholy, morose
6	Proto-Indo-European	tristh₂s	a third party standing, after the two parties to...
7	Proto-Indo-European	steh₂-	to stand

Every word from Proto-Indo-European steh₂- →Every word from Proto-Indo-European tristh₂s →Every word from Latin trīstis →