acute

• 形容事物非常尖锐、强烈或剧烈；也可指敏锐的头脑，或指急性的医学状况。

Describes something that is very sharp, severe, or intense; can also refer to a keen intellect or a short-term medical condition.

1. Sharp or severeB2formalmedical

   Used to describe a condition or illness that comes on quickly and is severe.

   急性的

   • He was admitted to the hospital with acute abdominal pain.
   • The patient is suffering from acute respiratory distress.
   • Acute infections require immediate medical attention.

   同义词criticalintenseseriousseveresharpsudden

   反义词chronic

2. Keen or perceptiveB2formal

   Having or showing a sharp ability to notice or understand things.

   敏锐的

   • She has an acute sense of hearing.
   • His acute observation skills helped solve the mystery.
   • The detective's acute mind quickly identified the suspect.

   同义词astutecleverdiscerninginsightfulkeenobservantpenetratingperceptivesharpshrewd

   反义词dullobtuseslow

3. Critical or seriousB2formal

   Used to describe a situation that is extremely serious or urgent.

   严重的

   • The country is facing an acute shortage of clean water.
   • There is an acute need for more teachers in rural areas.
   • The economic crisis has become acute in recent months.

   同义词criticaldesperatedireextremegravepressingserioussevereurgent

   反义词mildminornegligibleslight

4. GeometryB1formal

   Describing an angle that is less than 90 degrees.

   锐角

   • An acute angle measures between 0 and 90 degrees.
   • The triangle has three acute angles.
   • Draw an acute angle of 45 degrees.

   反义词obtuse

• 名词，指置于元音上方的符号（´），用来标示发音，例如重音。

A noun referring to a mark (') placed above a vowel to indicate pronunciation, such as an acute accent.

1. Diacritical markC1formal

   A mark (') placed above a vowel to indicate a specific pronunciation, such as stress or tone.

   尖音符

   • The word 'café' has an acute accent on the 'e'.
   • In French, the acute accent changes the pronunciation of the vowel.
   • The acute mark is used in several languages to indicate stress.

   同义词accentacute accent

2. Medical conditionB2formalmedical

   Having a rapid onset and a short but severe course, often used to describe an illness or symptom.

   急性

   • The patient was diagnosed with acute appendicitis.
   • Acute pain requires immediate medical attention.
   • The infection was acute and lasted only a few days.

   反义词chronic

3. Intense or sharpB2formal

   Extremely sharp, severe, or intense in effect or sensation.

   剧烈

   • She felt an acute sense of loss after the news.
   • The acute cold made it difficult to stay outside.
   • His acute hearing allowed him to detect the faintest sounds.

   同义词excruciatingintensekeenpiercingrackingseveresharpviolent

   反义词bluntdullmild

4. Keen perceptionB2formal

   Having or showing the ability to notice and understand things clearly; sharp-minded.

   敏锐的洞察力

   • She has an acute mind for solving complex problems.
   • His acute observation skills helped him spot the error.
   • The detective's acute reasoning solved the case.

   同义词astutediscerninginsightfulkeenpenetratingperceptivesharpshrewd

   反义词dullobtuse

5. Geometry angleB1formaltechnical

   An angle that measures less than 90 degrees.

   锐角

   • An acute angle is smaller than a right angle.
   • The triangle has three acute angles.
   • In geometry, acute angles are common in many shapes.

   反义词obtuse

6. B2formaltechnical

   Ending in a sharp point or having a pointed tip.

   尖头

   • The acute tip of the needle pierced the fabric easily.
   • The leaf has an acute apex.
   • The tool was designed with an acute edge for precision cutting.

   反义词bluntdull

7. B2formal

   Of critical importance or consequence; requiring immediate attention.

   至关重要

   • The acute shortage of water demands urgent action.
   • This is an acute problem that needs to be solved now.
   • The acute crisis affected the entire region.

   同义词criticalcrucialgravepressingseriousurgentvital

   反义词inconsequentialminornegligibletrivialunimportant