Where does “portentous” come from?

Portentous comes from Latin portentosus, from portentus (a sign or omen), derived from portendo (to stretch or point forward), combining por- with tendō (to stretch), ultimately from Proto-Indo-European per-.

portentous (English): Of momentous or ominous significance; Ominously...

Definitions

  1. Of momentous or ominous significance; Ominously...

Ancestry of “portentous”, step by step

StepLanguageWordMeaning
1Latinportentōsus
2Latinportentusindicated, pointed out; predicted, foretold
3LatinportendoI indicate, point out; I predict, foretell,...
4Latinpor-forth, forward, further, onward
5Proto-Italicpor-forth, forward
6Proto-Indo-Europeanper-before, in front; first; to go through
7Proto-Indo-Europeanpr̥tóspassed , crossed

Words derived from “portentous

Every word from Proto-Indo-European pr̥tósEvery word from Proto-Indo-European per-Every word from Latin por-
portentous — Etymology, Origin & Word History | Etymology Explorer