The term "free-living" refers to organisms that are not dependent on another for survival, such as plants, animals or insects. Antonyms for "free-living" include "parasitic," which refers to organisms that depend on others for their survival, "symbiotic," which refers to the mutualistic relationship between two different species, or "dependent," which describes organisms that require the assistance of others to live. Other antonyms that describe a lack of freedom in living include "captive," where organisms are confined, "domesticated," where organisms are bred for human use, and "subservient," where organisms are used to serve others. Antonyms provide a stark contrast to the original term and help us better understand the concept being described.