oso is equivalent to -ness
The spanish suffix -oso can be equivalent to the english suffix -ness?
1) The Spanish suffix -oso is equivalent to the English suffix -nous.
e.g. luminoso is the equivalent of luminous in English.
2) The Spanish suffix -dad is equivalent to the English suffix -ness.
e.g. bondad is the equivalent of kindness in English.
"oso" is a Spanish suffix that can become a noun in an adjective.
Example: pena-penoso, veneno-venenoso
"ness" is an English suffix that can become an adjective in a noun.
As you can see, it is the opposite of "ness".