irreproachable
adj. 无可指责的；无过失的
例句
She welcomed her unexpected visitor with irreproachable politeness.
她以无可指摘的礼仪接待了不速之客。
《柯林斯英汉双解大词典》
A man of irreproachable conduct commands the respect of others.
为人处世品行方正的人受人敬佩。
《新英汉大辞典》
It emerged that her past behavior was far from irreproachable.
事实表明，她过去的行为远不是无可指责的。
