Where does “peso” come from?

peso (Portuguese) comes from Spanish peso, from Old Spanish peso, from Vulgar Latin pesum, from Latin pēnsum, from Latin pendō, from Proto-Italic pendō, from Proto-Indo-European (s)péndeti, from Proto-Indo-European (s)pend- — to stretch.

peso (Portuguese): weight; heaviness; emotional pressure

Definitions

  1. weight; heaviness; emotional pressure

Ancestry of “peso”, step by step

peso traces back through two separate lines of ancestry.

via Spanish peso

StepLanguageWordMeaning
1Spanishpesoweight; weight class; peso
2Old Spanishpesoweight
3Vulgar Latinpesum
4Latinpēnsumallotment, portion, weight (of wool measured out to a slave to spin in a day)
5Latinpendōto weigh, weigh out
6Proto-Italicpendōhang, put in a hanging position
7Proto-Indo-European(s)péndeti
8Proto-Indo-European(s)pend-to stretch

via Old Portuguese peso

StepLanguageWordMeaning
1Old Portuguesepeso
Every word from Proto-Indo-European (s)pend-Every word from Proto-Indo-European (s)péndetiEvery word from Proto-Italic pendō