severe

Compared meaning: very serious or dangerous (adjective).

比较义项：严重的、危险的（程度深、情况危急）（形容词）。

• critical

  Used mainly for a point where someone's life is in immediate danger, especially in medicine ('critical condition'); also suggests a decisive turning point. More clinical and urgent than serious.

  主要用于形容生命垂危、情况危急的时刻，尤其用在医学语境中（如“病危”）；也可表示决定性的关键时刻。语气比 serious 更专业、更紧迫。

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

  车祸后，司机被紧急送往医院，伤势危重。

• serious

  The mildest, most general term here, covering injuries, illnesses or problems that are bad but not necessarily life-threatening. Fits many everyday situations where the other three would sound too strong.

  四个词中语气最温和、最笼统，可泛指伤情、疾病或问题“严重”，但不一定危及生命。适用于许多日常场合，换成其他三个词会显得语气过重。

  He suffered a serious knee injury that kept him out of sport for months.

  他膝盖严重受伤，好几个月都不能参加运动。

• dire

  The strongest word here, stressing extreme severity and urgency and often warning of a bad outcome to come. Typically fixed with 'need', 'consequences' or 'straits'; sounds dramatic or literary.

  四个词中语气最强，强调程度极其严重、情况紧迫，常带有警示即将发生坏结果的意味。常与“需要”（need）、“后果”（consequences）、“困境”（straits）等词固定搭配，语体偏夸张、文学化。

  After the earthquake, survivors were in dire need of food, water and shelter.

  地震过后，幸存者们极度需要食物、水和住所。

• severe 本词

  Focuses on the intensity of something bad, such as pain, weather, damage or punishment, without necessarily implying danger to life. Common with weather, injuries and penalties.

  侧重形容坏事的强度或程度，例如疼痛、天气、损失或惩罚，但不一定意味着生命垂危。常与天气、伤情和处罚等词搭配使用。

  The storm caused severe damage to the old bridge, closing it for repairs.

  那场暴风雨给那座老桥造成了严重损坏，桥梁因此关闭维修。

Critical, serious, dire and severe all describe something dangerous, but strength differs. Critical means life is in immediate danger. Serious is mildest, covering bad but not life-threatening problems. Dire is strongest, warning of extreme danger. Severe stresses intensity, like pain or weather, without implying danger.

这四个词都可用来形容伤情、天气或局势的严重、危险程度，但紧迫感和语气强弱不同：dire 语气最强，serious 语气最温和；这里不比较 critical 表示“批评的”这一义项，也不比较 serious 表示人的神情或态度“严肃认真”的这一义项。

Compared meaning: very strict (adjective).

比较义项：严格的（形容词）。

• severe 本词

  Severe describes rules, punishment, criticism, or tests as harshly strict or exacting; it emphasizes the intensity of the standard rather than a person's facial expression or tone.

  severe用于形容规则、惩罚、批评或考验等严厉、苛刻，强调标准的严格程度，而非某人的表情或语气。

  The company imposed severe penalties on employees who broke the safety rules.

  公司对违反安全规定的员工处以严厉的处罚。

• stern

  Stern typically describes a person's face, voice, or manner as serious and unsmiling, conveying firm authority and disapproval, rather than the harshness of a rule or punishment itself.

  stern通常形容人的表情、语气或态度严肃、不苟言笑，传达出坚定的权威感和不满，而不是形容规则或惩罚本身的严厉程度。

  The coach wore a stern expression as he lectured the team about their mistakes.

  教练板着严肃的脸，训斥球队犯下的错误。

Severe and stern both mean very strict. Severe usually describes rules, punishment, or criticism, showing how harsh a standard is. Stern usually describes a person's face, voice, or manner, showing a serious, unsmiling attitude. Not compared: severe meaning very intense, as in severe damage.

这两个词在“严格的”这一义项上意思相近，都表示要求严格、不容通融，但severe更常修饰规则、惩罚或批评，强调标准的严厉程度；stern更常描述人的表情、语气或态度，强调不苟言笑、令人生畏。这里不比较severe表示“剧烈的，严重的”（如severe damage）等其他义项。

Compared meaning: very great in degree or intensity (adjective).

比较义项：程度或强度极大（形容词）。

• severe 本词

  Marks an extreme, often harmful degree of something negative, such as illness, weather, damage, or punishment; more formal and serious in tone, without implying violence or force.

  表示某种消极事物达到极端、严重的程度，常用于疾病、天气、损害或惩罚；语气比strong更正式、更严重，但并不暗示暴力或外力。

  Severe drought left many farmers with almost no harvest this year.

  严重的干旱使许多农民今年几乎颗粒无收。

• strong

  The most general and neutral word for high intensity of a quality, such as smell, taste, wind, or feeling; can describe positive or negative things and lacks any sense of harm or force.

  是最通用、中性的词，用来表示某种特质（如气味、味道、风力或感觉）的强烈程度；既可用于积极的事物，也可用于消极的事物，不带有伤害或外力的含义。

  There's a strong smell of gas coming from the old stove.

  那台旧炉子散发出一股强烈的煤气味。

• violent

  Implies intensity combined with sudden force, aggression, or danger, as in storms, emotions, or actions; stronger and more alarming in tone than severe or strong.

  强调强烈程度伴随突然的外力、攻击性或危险，如暴风雨、情绪或行为；语气比severe或strong更强烈、更令人不安。

  Their argument turned violent when he suddenly threw a chair across the room.

  他们的争吵变得激烈起来，他突然把一把椅子扔到了房间对面。

Severe, strong, and violent all show very high intensity. Severe stresses a harmful result and is formal; strong is the plain, neutral choice; violent adds sudden force, as in a violent storm. Not compared: severe (strict), strong (physically powerful), violent (using force to hurt someone).

在这个意义上，severe、strong、violent都可以表示程度或强度很高，容易混淆，但语气和用法不同：severe侧重负面结果的严重程度，语气较正式；strong是最通用、中性的说法；violent则强调伴随突然外力或攻击性的强烈程度。这里不比较severe表示“严厉的、严格的”的意思，也不比较strong表示“力气大的、结实的”的意思，也不比较violent表示“使用暴力伤害他人的”的意思。