The term sub-serve means serving to promote or assist something, and its antonyms vary depending on the context. In the context of hindering or obstructing, impede, disrupt, and thwart are potential antonyms for sub-serve. In the sense of being a subordinate or serving under someone, synonyms like dominate, command, and govern would be antonyms for sub-serve. In terms of behaving or acting selfishly, antonyms might include selflessness, altruism, or magnanimity. Additionally, antonyms for sub-serve could include ignoring, neglecting, or abandoning, depending on the context. Overall, the antonyms for sub-serve are contextual and the opposite of anything that serves a purpose or aids in something specific.