The phrase "bring back life" refers to the process of revitalizing or reanimating something that has lost its vitality or energy. Antonyms for this phrase might include "drain life," "sap energy," or "remove vitality." These terms suggest a process of weakening or destroying something, rather than reviving it. Other potential antonyms might include "quench life," "stifle energy," or "suppress vitality," all of which imply a process of limiting or stifling growth and energy. Ultimately, the antonyms for "bring back life" all point to various forms of preventing or destroying vitality and growth, rather than nurturing it.