What does -sonus mean in Latin?

-sonus, a suffix, means “Forms adjectives qualifying something in respect to the sound it emits”.

suffixfirst/second-declension suffix

-sonus

-sonus (feminine -sona, neuter -sonum)

morphemesuffixForms adjectives qualifying something in respect to the sound it emits
horreō (“to shiver”) > horrisonus (“having a sound that makes one shiver”)
arma (“arms”) > armisonus (“resounding with weapons”)

From sonō (“to sound”) + -us (adjective-forming suffix).

What does -sonus mean in Latin?: -sonus, a suffix, means “Forms adjectives qualifying something in respect to the sound it emits”.