Where does “precarious” come from?

Precarious derives from Latin precarius, formed with the suffix -arius from Latin prex, which traces to Proto-Indo-European preḱ- and ultimately pr̥ḱneh₂, roots relating to entreaty or asking.

precarious (English): Dangerously insecure or unstable; perilous;...

Definitions

  1. Dangerously insecure or unstable; perilous;...

Ancestry of “precarious”, step by step

precarious traces back through two separate lines of ancestry.

via English carious

StepLanguageWordMeaning
1EnglishcariousHaving caries decayed, rotten
2Frenchcarieuxcarious
3Frenchcariedecay uncountable, cavity countable process or result of bone or teeth being gradually decomposed
4Latincariēsdecay, rot, rottenness, corruption
5Latincareōto lack, be without. (usually with ablative), to be deprived of
6Proto-Italickazēōto lack
7Proto-Indo-Europeanḱes-éh₁-ye-ti
8Proto-Indo-Europeanḱes-to cut off, separate; to cut up, to slaughter; to...

via Latin precārius

StepLanguageWordMeaning
1Latinprecāriusrelated to entreaty or petition
2Latinprexprayer; request; entreaty
3Proto-Italicpreks
4Proto-Indo-Europeanpréḱs
5Proto-Indo-Europeanpreḱ-to ask
6Proto-Indo-Europeanpr̥ḱneh₂

Words derived from “precarious

Every word from Proto-Indo-European ḱes-