The word "more unwithered" implies the quality of being fresh or unspoiled. Its antonyms, therefore, would be words that indicate decay, deterioration, or age. Some examples may include withered, decayed, dead, stale, stalemate, and old. These antonyms highlight the opposite of the freshness and vitality that "more unwithered" conveys. They suggest that something has lost its charm, energy, or life force. While "more unwithered" may be used to describe plants, flowers, or people, its antonyms are applicable for any object or situation where the quality of being fresh or unspoiled is not present.