incorrigible
词根词缀：
incorrigibility n. 无可救药
in 不 + corrig 改正 + ibility 可…性；易…性 → 不能改正 → 无可救药
incorrigible adj. 不能改正的
in 不 + corrig 改正 + ible 可…的，能…的；具有…性质的 → 不能改正的
数据来源：新东方英语词汇速记大全
相关例句：
Ayer insists: 'What we directly perceive are sense-data', and furthermore, he produces the incorrigible foundations for the empirical knowledge.
艾耶尔提出：我们直接感知到的是感觉予料，以此还为经验知识找到了感觉予料陈述作为不可错的基础。
That you're taking a break from your marriage and you're incorrigible.
你想从婚姻中暂时解脱一下和你无可就药。
Bad habits of gamble or drug addiction which remain incorrigible despite repeated admonition;
有赌博、吸毒等恶习屡教不改的；
But the question is how, if a learner of English does not know how to practice, he must be irrevocably incorrigible.
但是问题是如何才能做到熟能生巧呢？当英语学习者不知道如何练习时，他难免会认为自己不可救药了。
When disbelief of the human kind blossomed into misanthropy, the newly shaped end was incorrigible. ( UTOYXC)
当对人类的怀疑发展到愤世，新的结果便往往难以扭转了。
In truth, I found myself incorrigible with respect to order.
真的，我发现自己在秩序方面实在积习难改。