Where does “sesta” come from?

sesta (Old Portuguese) comes from Latin sexta, from Latin Sextus, from Latin sex, from Proto-Italic seks, from Proto-Indo-European swéḱs — six.

Ancestry of “sesta”, step by step

StepLanguageWordMeaning
1LatinsextaNoon, reckoned as the sixth hour of daylight;...
2LatinSextusparticularly popular in Gaul. (Occasionally also found as a cognomen.) In particular
3Latinsexsix; 6
4Proto-Italicsekssix
5Proto-Indo-Europeanswéḱssix

Words derived from “sesta

Every word from Proto-Indo-European swéḱsEvery word from Proto-Italic seksEvery word from Latin sex