Indubitably is a rarely used word, and many people may not have heard of it. However, it is worth exploring, as it is a synonym for "unquestionably." If you want to replace "in-dub" with another term, you may use synonyms such as undoubtedly, certainly, absolutely, unmistakably, and unquestionably. These terms convey a sense of certainty and conviction that leaves no room for doubt. They are often used to emphasize the truth of a statement or the accuracy of a fact. Whether you choose to use "in-dub" or one of its synonyms, the goal is to convey unwavering confidence in the information being shared.