Where does “triarcuate” come from?

triarcuate (English) comes from English arcuate, from Latin arcuatus, from Latin arcus, from Latin solium, from Proto-Indo-European sodyom, from Proto-Indo-European sḗd- — to sit.

triarcuate (English): Having three arcuate curves

Definitions

Having three arcuate curves

Ancestry of “triarcuate”, step by step

triarcuate traces back through two separate lines of ancestry.

via English arcuate

Step	Language	Word	Meaning
1	English	arcuate	curved into the shape of a bow
2	Latin	arcuatus	curved, arched
3	Latin	arcus	arc, arch; bow; rainbow
4	Latin	solium	seat, chair; throne, chair of state, official...
5	Proto-Indo-European	sodyom	—
6	Proto-Indo-European	sḗd-	to sit

via English tri

Step	Language	Word	Meaning
1	English	tri	triathlon; triangle
2	Proto-Indo-European	tréyes	three

Every word from Proto-Indo-European sḗd- →