lunatic

• 形容一个人患有精神疾病或极度疯狂、不理智；也可非正式地形容某事愚蠢至极或鲁莽轻率。

Describes someone who is mentally ill or extremely foolish; also used informally to describe something wildly foolish or reckless.

1. Insane or madC1formal

   Historically, someone considered insane, with a belief that their condition was influenced by the moon's phases.

   疯狂的

   • The old asylum housed many deemed lunatic.
   • In medieval times, a lunatic was often blamed on lunar cycles.
   • The term 'lunatic' is now considered outdated and offensive.

   同义词crazeddementedderangedinsanemadmaniacalmoonstruckpsychoticunhinged

   反义词lucidrationalsane

2. Extremely foolish or recklessB2informal

   Used informally to describe actions or ideas that are wildly irrational or dangerous.

   疯狂的

   • That was a lunatic plan to drive through the storm.
   • Only a lunatic would try to climb that cliff without gear.
   • His lunatic behavior at the party shocked everyone.

   同义词crazydangerousfoolhardyfoolishharebrainedidioticinsanemadrecklesswild

   反义词prudentrationalsanesensiblewise

• 名词，指被认为精神失常或精神不健康的人，也指行为鲁莽、冲动、不负责任的人。

A noun referring to a person who is considered insane or mentally deranged, or someone who behaves in a reckless, impetuous, and irresponsible manner.

1. Insane personB2formal

   A person who is considered mentally ill, especially in a severe or dangerous manner.

   疯子

   • The villagers feared the old lunatic who lived alone in the woods.
   • In the past, asylums were filled with people deemed lunatics.
   • She was wrongly labeled a lunatic because of her unusual beliefs.
   • The novel tells the story of a harmless lunatic whose actions are misunderstood.

   同义词bedlamitemadmanmadwomanmaniacpsychopathpsychoticsociopath

2. Reckless and irresponsible personB2informal

   A person who behaves in a wildly foolish, impetuous, or dangerous way, ignoring consequences.

   鲁莽的人

   • Only a lunatic would drive that fast on a rainy night.
   • He’s a complete lunatic when it comes to spending money.
   • Some lunatic jumped off the bridge into the river for a dare.
   • Don't listen to him—he's a financial lunatic who gambles his savings away.

   同义词crackpotdaredevilfoolhotheadmadmanmaniacwild man

   反义词carefulcautiousprudentresponsiblesensible