adj.无懈可击的；无瑕疵的
Your English is impeccable! 你的英语十分好！
He was proud of his impeccable pedigree. 他为他出身于名门望族而骄傲。
He was proud of his impeccable good manners. 他为自己无可挑剔的端庄举止而感到自豪。
From this we can see her impeccable moral integrity. 从这件事上，我们看到了她白璧无暇的美好心灵。
