ADJ-GRADED
无瑕疵的;无可挑剔的
If you describe something such as someone's behaviour or appearance as impeccable, you are emphasizing that it is perfect and has no faults.
例句
She had impeccable taste in clothes...
她的穿衣品位无可挑剔。
Her academic credentials are impeccable.
她的学术背景无可挑剔。