The word "depreciating" refers to the diminishing value of something. To describe something as "more depreciating," one could use several synonyms depending on the context. For instance, "worsening" implies a gradual decline, while "deteriorating" suggests a more rapid deterioration. "Degenerating" implies a decline in quality or character, while "degrading" may suggest a loss of status or rank. "Diminishing" and "weakening" both refer to a loss of strength or value. Ultimately, the choice of synonym depends on the level of emphasis needed to describe the extent of depreciation taking place.