unblemished
词根词缀：
blemish v. 玷污
blem 弄脏 + ish 使… → 玷污
unblemished adj. 无瑕疵的
un 没有 + blemish 玷污 + ed 表形容词 → 没被玷污的 → 无瑕疵的
数据来源：新东方英语词汇速记大全
相关例句：
You essence is as pure and perfect as an unblemished jewel.
你的本质如同无瑕的珠宝一样完美无缺。
Nowadays, unblemished or even perfect faces are the rule on magazine covers and billboards.
现在，没有瑕疵或者甚至是完美的脸在杂志封面或者广告板上是必须的。
So far Mr kleinfeld's integrity is unblemished.
到今天为止，柯菲德的职业操守一清二白。
Free from flaw or blemish or impurity. He has an unblemished employment record.
无缺陷、污迹或杂质的。他的（工作）履历毫无污点。
For six years his championship record was unblemished.
他的冠军记录有6年一无瑕疵。
To be eligible to leave prison and work in the restaurant, inmates must have kept up an unblemished record through at least 12 years of imprisonment, besides a high school education.
囚犯如想离开监狱在餐厅工作，就必须有一份至少长达12年的监禁无污点记录，而且还必须有高中学历。