Where does “cinco” come from?

cinco (Old Portuguese) comes from Vulgar Latin cinque, from Latin quīnque, from Proto-Italic kʷenkʷe, from Proto-Indo-European pénkʷe — five.

Ancestry of “cinco”, step by step

StepLanguageWordMeaning
1Vulgar Latincinquefive
2Latinquīnquefive; 5
3Proto-Italickʷenkʷefive
4Proto-Indo-Europeanpénkʷefive

Words derived from “cinco”

Every word from Proto-Indo-European pénkʷe →Every word from Proto-Italic kʷenkʷe →Every word from Latin quīnque →