Where does “saturnine” come from?

saturnine (Middle English) comes from Old French saturnine, from Latin Sāturnīnus, from Latin -īnus, from Proto-Italic -īnos, from Proto-Indo-European -iHnos, from Proto-Indo-European -no- — adjectival suffix.

Ancestry of “saturnine”, step by step

StepLanguageWordMeaning
1Old Frenchsaturnine—
2LatinSāturnīnus—
3Latin-īnusof or pertaining to; -ine
4Proto-Italic-īnosof/belonging to
5Proto-Indo-European-iHnosCreates adjectives of materials
6Proto-Indo-European-no-adjectival suffix

Words derived from “saturnine”

Every word from Proto-Indo-European -no- →Every word from Latin -īnus →Every word from Proto-Italic -īnos →