Where does “promessa” come from?

promessa (Old Portuguese) comes from Vulgar Latin promissa, from Latin prōmissum, from Latin promissus, from Latin prōmittō, from Latin prō, from Latin ratus, from Latin rēōr, from Proto-Italic rēōr — to fit, to fix, to put together.

Ancestry of “promessa”, step by step

StepLanguageWordMeaning
1Vulgar Latinpromissapromise
2Latinprōmissumpromise
3Latinpromissuspromised
4Latinprōmittōto send forth
5Latinprōfor
6Latinratusconsidered, having been considered; established,...
7Latinrēōrto reckon, calculate
8Proto-Italicrēōrto reckon, to calculate; to think, to deem, to...
9Proto-Indo-Europeanh₂reh₁-to think, reason; to arrange
10Proto-Indo-Europeanh₂er-to fit, to fix, to put together

Words derived from “promessa

Every word from Proto-Indo-European h₂er-Every word from Proto-Indo-European h₂reh₁-Every word from Proto-Italic rēōr