Where does “decimoquinto” come from?

decimoquinto (Spanish) comes from Spanish décimo, from Latin Decimus, from Latin decem, from Latin -nus, from Proto-Italic -nos, from Proto-Indo-European -nós — Creates verbal adjectives from roots.

decimoquinto (Spanish): fifteenth

Definitions

fifteenth

Ancestry of “decimoquinto”, step by step

decimoquinto traces back through two separate lines of ancestry.

via Spanish décimo

Step	Language	Word	Meaning
1	Spanish	décimo	tenth; participation in the lottery; 10-centésimo...
2	Latin	Decimus	originally used for a tenth-born son
3	Latin	decem	ten; 10
4	Latin	-nus	-an
5	Proto-Italic	-nos	Creates verbal adjectives from verb stems
6	Proto-Indo-European	-nós	Creates verbal adjectives from roots

via Spanish quinto

Step	Language	Word	Meaning
1	Spanish	quinto	fifth; A young boy of a various towns who turns...
2	Latin	Quīntus	—
3	Latin	plicō	to fold, bend or flex; to roll up
4	Proto-Indo-European	pleḱ-	to fold, plait, weave
5	Proto-Indo-European	pel-	to cover, to wrap; skin, hide, cloth; to fold

Every word from Proto-Indo-European -nós →Every word from Latin -nus →Every word from Latin decem →