adj.未受過挑戰(zhàn)的；未受質(zhì)疑的

He is in a position of unchallenged authority. 他擁有絕對的權(quán)威。

But these advertising ventures are not going unchallenged. 但是那些廣告風(fēng)險并沒有受到挑戰(zhàn)。

He is an unchallenged political leader. 他是一位無可爭議的領(lǐng)導(dǎo)人。

She could not allow such a claim to go unchallenged. 她不能對這樣的要求聽任不管。