Where does “ardu” come from?

ardu (Catalan) comes from Latin arduus, from Proto-Italic arðwos, from Proto-Indo-European h₃erdʰ-, from Proto-Indo-European -wós — Creates adjectives from verb stems.

ardu (Catalan): steep of a near-vertical gradient

Definitions

  1. steep of a near-vertical gradient

Ancestry of “ardu”, step by step

StepLanguageWordMeaning
1Latinarduuslofty, high, steep, tall, elevated; hard to...
2Proto-Italicarðwos—
3Proto-Indo-Europeanh₃erdʰ-to increase, grow; upright, high
4Proto-Indo-European-wósCreates adjectives from verb stems
Every word from Proto-Indo-European -wós →Every word from Proto-Indo-European h₃erdʰ- →Every word from Proto-Italic arðwos →
ardu — Etymology, Origin & Word History | Etymology Explorer