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a discredited + noun
discredited 作定语时修饰名词，表示该事物已被认为无效或不可靠。
The report cited a discredited study.
这份报告引用了一项已被否定的研究。
不可信的；声誉扫地的；不值得信任的
先理解核心含义，再看它在真实句子里的用法。
不可信的；声誉扫地的；不值得信任的
Considered invalid, unreliable, or untrustworthy.
The report cited a discredited study.
这份报告引用了一项已被否定的研究。
被认为是无效、不可靠或不值得信赖的。
Considered invalid, unreliable, or untrustworthy.
The discredited theory was no longer taught in universities.
那个不足信的理论不再在大学里讲授。
He refused to work with the discredited scientist after the scandal.
丑闻之后，他拒绝与那位不名誉的科学家合作。
Many voters ignored the discredited politician's campaign promises.
许多选民忽视了那位不名誉的政客的竞选承诺。
discredited 作定语时修饰名词，表示该事物已被认为无效或不可靠。
The report cited a discredited study.
这份报告引用了一项已被否定的研究。
也可用 be discredited 表示状态，如：His claims are discredited.（他的说法已不被采信。）
The theory became discredited after the experiment failed.
实验失败后，这个理论变得不再可信。
这是后置定语用法，相当于定语从句 that is discredited by...
A theory discredited by new evidence should be abandoned.
一项被新证据否定的理论应该被抛弃。
Not this
The theory discredited after the scandal.
Use this
The theory was discredited after the scandal.
英语中表示“被认为不可信”时，discredited 是形容词/过去分词，作表语必须有 be 动词。汉语形容词可直接作谓语，但英语不行，因此原句缺少系动词，应改为 was discredited。
Not this
The discrediting theory was rejected by scientists.
Use this
The discredited theory was rejected by scientists.
-ed 形容词表示主语自身的状态，-ing 形容词表示对他人的影响。discredited 意为“被否定的、不可信的”，discrediting 意为“有损声誉的”。此处指理论本身不可信，应用 discredited。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
已被推翻的理论
The discredited theory was finally abandoned by the scientific community.
这个已被推翻的理论最终被科学界抛弃。
名誉扫地的政客
The discredited politician resigned after the scandal.
这位名誉扫地的政客在丑闻后辞职了。
不可采信的证据
The court refused to accept the discredited evidence.
法院拒绝接受这些不可采信的证据。
被驳斥的说法
The discredited claim was removed from the official report.
这一被驳斥的说法已从官方报告中删除。
已被否定的做法
Bloodletting is now a discredited practice in medicine.
放血疗法如今在医学上是一种已被否定的做法。
Use discredited naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
dis（否定）+ credit（信用）→ 信用被剥夺，等于“不可信/声誉扫地”。
语域：formal 常见场景：学术写作、新闻报道、正式声明或法律讨论 该词多用于正式或书面语境，常出现在学术讨论、新闻评论和法律辩论中，形容理论、证据或人物已被认为不可信。口语中较少用，但并非绝不会出现。
同韵词：accredited、uncredited、credited、edited 与 discredited 押韵（重读元音 /ɛ/ 后接 /dɪtɪd/）。注意形似但不同音：excited /ɪkˈsaɪtɪd/ 和 united /juˈnaɪtɪd/ 结尾虽同为 -ited，但读 /aɪtɪd/，不押韵。
Dictionary facts from ECDICT, WIKTIONARY, WORDNET.