Where does “ulterior” come from?

ulterior (Piedmontese) comes from Latin ulterior, from Latin -ior, from Proto-Italic -jōs, from Proto-Indo-European -yós — Creates adjectives from noun or verb stems.

Ancestry of “ulterior”, step by step

StepLanguageWordMeaning
1Latinulteriorfurther away
2Latin-ior"third declension"; forms adjectives’ comparative...
3Proto-Italic-jōsForms comparative adjectives
4Proto-Indo-European-yósCreates adjectives from noun or verb stems
Every word from Proto-Indo-European -yós →