adj.無懈可擊的；無瑕疵的
He was proud of his impeccable pedigree. 他為他出身于名門望族而驕傲。
He was proud of his impeccable good manners. 他為自己無可挑剔的端莊舉止而感到自豪。
From this we can see her impeccable moral integrity. 從這件事上，我們看到了她白璧無暇的美好心靈。
