What are the opposite words for superadditive?

Superadditive means that the whole is more than the sum of its parts. Antonyms for superadditive include "subadditive" which refers to the concept of a system where the whole is less than the sum of its parts. Another possible antonym is "additive" which means that the whole is equal to the sum of its parts. Both subadditive and additive are different from superadditive, which denotes an outcome where interdependence and cooperation generate benefits that exceed the cumulative advantages of individual efforts. In contrast, subadditive and additive states imply a reduction or absence of benefits derived from cooperation or interdependence.