Antonyms for the word "altering to" can imply maintaining or preserving a state or condition. Words like "unchanged," "unmodified," "unvaried," "unvarying," or "unadulterated" indicate a lack of modification or alteration. Words like "constant," "consistent," "invariable," or "steady" suggest stability or reliability. In contrast, other antonyms could suggest a deterioration or a change in a negative direction. Words like "degradation," "deterioration," or "decay" indicate a negative change or a loss of quality. Overall, antonyms for "altering to" can indicate either a lack of change or a negative shift in state or condition.