grave

Compared meaning: a place where a dead body is buried (noun).

比较义项：坟墓（安葬遗体的地方）（名词）。

• grave 本词

  The general, neutral word for a burial place, usually a simple plot in the ground with a headstone; the everyday choice for describing where any ordinary person is buried.

  表示“坟墓”最普通、最中性的说法，通常指地面上带墓碑的简单墓穴；用于描述普通人被安葬的地方时最为常用。

  She places fresh flowers on her grandfather's grave every Sunday.

  她每个星期天都会在祖父的坟墓上献上鲜花。

• tomb

  A grave that is notably large or grand, often a stone structure built above or into the ground; typically used for kings, ancient rulers, or in archaeological and historical contexts.

  指规模较大或宏伟的坟墓，常以石头建造成地面或地下建筑；多用于国王、古代统治者，或历史与考古语境中。

  Archaeologists discovered an ancient tomb hidden beneath the desert sand.

  考古学家在沙漠的沙子下发现了一座古老的陵墓。

Grave and tomb both mean a place where a body is buried, but differ in scale. Grave is the common, neutral word for an ordinary burial place, usually a simple plot. Tomb usually means a larger, often stone structure, sounding ancient, common in history.

这两个词在这一意义上都指“坟墓”，但语气和规模不同：grave 是最常见、最中性的说法，指普通的墓穴；tomb 通常指规模较大、常以石头建造的坟墓，带有庄重或古代色彩，常出现在历史或考古语境中。

Compared meaning: very serious and causing worry (adjective).

比较义项：严重的，令人担忧的（形容词）。

• grave 本词

  Grave is formal and literary, describing serious danger or trouble that causes deep worry; it pairs with abstract nouns like danger, concern, or mistake, not illnesses or injuries.

  该词较为正式、书面化，形容令人深感忧虑的严重危险或麻烦，常与danger、concern、mistake等抽象名词搭配，不用于疾病或伤势。

  The scandal put the company in grave danger of losing its biggest client.

  这起丑闻使公司严重面临失去最大客户的危险。

• critical

  Critical describes a situation at a decisive turning point where the outcome could go either way, especially in medical or survival contexts, such as a critical condition.

  该词指处于生死攸关的转折点，情况可能好转也可能恶化，常用于医疗或生存相关的语境，如“病危”。

  After the accident, the driver was rushed to hospital in critical condition.

  事故发生后，司机被紧急送往医院，情况危急。

• serious

  Serious is the plain, everyday word for anything bad or dangerous enough to need attention; it works for illnesses, injuries, problems, or mistakes without special formality or intensity.

  该词是最普通、日常的用词，指任何严重到需要重视的坏事或危险，适用于疾病、伤势、问题或错误，没有特别的正式感或强调语气。

  She suffered a serious injury to her knee during the football match.

  她在足球比赛中膝盖受了重伤。

• dire

  Dire is the strongest of the four, stressing extreme urgency and alarming consequences if nothing is done, and often appears in phrases like dire need or dire consequences.

  该词是四者中程度最强的，强调若不采取行动将产生极其紧迫、令人震惊的后果，常见于“极度需要”等固定搭配中。

  Refugees in the camp are in dire need of food and clean water.

  营地里的难民极其需要食物和干净的水。

Grave, critical, serious, and dire describe a bad situation, differing in formality. Grave is formal, as in grave concern. Critical means a turning point, often medical. Serious is the everyday word for anything bad. Dire is strongest, showing urgency. This excludes grave (a burial place).

这四个词都能形容情况严重或危险，但正式程度和强调重点不同：grave偏正式庄重，critical强调处于生死攸关的转折点，serious最为常见普通，dire强调极端紧迫、后果可怕。这里不比较grave作为名词“坟墓”的意思。