unchallenged 词形变化: 形容词: unchainable | 动词过去式: unchained | 动词过去分词: unchained | 动词现在分词: unchaining | 动词第三人称单数: unchains | 同义词: release | free | unshackle | extricate | liberate | emancipate | loosen | unlock | unfetter | 反义词: chain |