Antonyms for the word "more unaltered" include "changed," "modified," "transformed," "altered," "adapted," "mutated," "evolved," "refined" and "improved." These words represent changes in something that was previously untouched or unmodified. "Changed" suggests that the original state was different, while "modified" implies some form of improvement or refinement. "Transformed" and "adapted" suggest a complete overhaul or adjustment to a new environment or circumstance, while "altered" and "mutated" suggest a physiological or chemical change. "Evolved" and "refined" imply a gradual improvement or development over time, rather than a sudden or drastic change.