infamous

Compared meaning: well known for bad things (adjective).

比较义项：因坏事而出名、声名狼藉（形容词）。

• notorious

  Broader and lighter in tone: usually followed by 'for' plus a specific fault (traffic, service, a habit), common in everyday and news English, the badness need not be very serious.

  语气较轻、使用更广泛：通常接for说明具体的缺点（如交通、服务、某种习惯），日常和新闻用语中很常见，坏的程度不一定很严重。

  This restaurant is notorious for its slow service and rude staff.

  这家餐厅因服务缓慢、员工态度差而声名狼藉。

• infamous 本词

  Stronger and more serious: implies real wickedness or scandal, often describing historical criminals or major evildoers, and can directly modify a noun without needing 'for'.

  语气更重、程度更严重：暗示真正的邪恶或丑闻，常用来形容历史罪犯或重大恶行，也可以不接for直接修饰名词。

  The infamous dictator ordered thousands of executions during his reign.

  这位臭名昭著的独裁者在位期间下令处决了成千上万的人。

Notorious and infamous both mean widely known for something bad, close in meaning, but strength differs. Notorious is lighter, usually followed by 'for' plus a specific fault, common in everyday and news English. Infamous is stronger, for real wickedness, historical criminals, or major scandals.

这两个词都表示因做坏事或有坏名声而广为人知，语义十分接近，但语气强弱和使用场合略有不同：notorious语气较轻，常搭配for说明具体的坏名声（如交通、服务、脾气），日常和新闻用语中很常见；infamous语气更重，多用于严重的恶行、历史罪人或重大丑闻，也可以不接for直接放在名词前使用。