Where does “arco” come from?

arco (Chavacano) comes from Spanish arco, from Latin arcus, from Latin solium, from Proto-Indo-European sodyom, from Proto-Indo-European sḗd- — to sit.

arco (Chavacano): arch

Definitions

arch

Ancestry of “arco”, step by step

Step	Language	Word	Meaning
1	Spanish	arco	bow; arc; arch
2	Latin	arcus	arc, arch; bow; rainbow
3	Latin	solium	seat, chair; throne, chair of state, official...
4	Proto-Indo-European	sodyom	—
5	Proto-Indo-European	sḗd-	to sit

Every word from Proto-Indo-European sḗd- →Every word from Proto-Indo-European sodyom →Every word from Latin solium →