unambiguous

absolute apparent categorical certain clean-cut clear clear-cut clearer clearest conclusive decided definitive definite direct distinct evident express inarguable incontestable intelligible limpid lucid manifest more apparent more evident more positive more understandable more specific more undisputable most apparent most certain most undisputable perspicuous positive specific straightforward transparent unassailable understandable undisputable unequivocal unmistakable well-defined