-osus

From Old Latin -ōsos, from *-ōnt-to-s, from Proto-Italic *-owonssos, from *-o-wont-to-s. The last form is a combination of two Proto-Indo-European suffixes: Proto-Indo-European *-went-, *-wont- and Proto-Indo-European *-to-.[1] See -entus and Ancient Greek -εις (-eis).

• (Classical) IPA^(key): /ˈoː.sus/, [ˈoːs̠ʊs̠]
• (modern Italianate Ecclesiastical) IPA^(key): /ˈo.sus/, [ˈɔːs̬us]

-ōsus (feminine -ōsa, neuter -ōsum); first/second-declension suffix

1. -ose, -ous; full of, overly, prone to. Used to form adjectives from nouns.

The suffix -ōsus is added to a noun to form an adjective indicating an abundance of that noun.

Examples:

nervōsus (“nervous”), from nervus (“sinew, energy”)

racēmōsus (“racemose”), from racēmus (“cluster, bunch”)

ventōsus (“windy”), from ventus (“wind”)

First/second-declension adjective.