Where does “irosus” come from?

irosus (Late Latin) comes from Latin -osus, from Old Latin -osos, from Latin ont-to-s, from Latin -o-wont-to-s.

Ancestry of “irosus”, step by step

StepLanguageWordMeaning
1Latin-osus-ose, -ous; full of, overly, prone to
2Old Latin-ososaccusative masculine plural of -ōsus
3Latinont-to-s—
4Latin-o-wont-to-s—
Every word from Latin -o-wont-to-s →Every word from Latin -osus →Every word from Old Latin -osos →