Roots out means to eradicate or remove completely. The antonyms for roots out might include phrases like cultivating, promoting, reinforcing, nurturing, or preserving. These terms are all about building up or strengthening something instead of tearing it down. For example, instead of rooting out a problem, you could cultivate a solution; instead of rooting out bad behavior, you could reinforce good behavior. Similarly, preserving a tradition is the opposite of rooting it out, as is nurturing a relationship instead of ending it. Using antonyms is a great way to expand your vocabulary and learn more about different ways to approach a situation.