急性の

Let's learn how to use the Japanese word 急性の (kyuusei no) in sentences. This word means "acute" or "sudden and severe." It's often used in medical contexts, but you'll also find it in other situations where something happens suddenly and seriously.

§ Understanding 急性の (kyuusei no) as an adjective

急性の is a な-adjective (na-adjective). This means it connects to a noun with の (no). Think of it like saying "acute [something]" in English.

Definition

Acute; sudden and severe.

§ Common phrases with 急性の (kyuusei no)

Here are some common ways you'll see 急性の used, especially in a medical context.

• 急性の痛み (kyuusei no itami): acute pain

• 急性の病気 (kyuusei no byouki): acute illness

• 急性の症状 (kyuusei no shoujou): acute symptoms

§ Examples in sentences

Let's look at some examples to see how 急性の works in real sentences.

Kare wa kyuusei no fukutsuu de byouin ni hakobareta.

He was rushed to the hospital with acute abdominal pain.

Kono byouki wa kyuusei no kanen o hikiokosu koto ga arimasu.

This disease can cause acute hepatitis.

Kyuusei no sutoresu wa shinshin ni akueikyou o oyoboshimasu.

Acute stress has a negative impact on both mind and body.

§ When to use it vs. other words

While 急性の specifically means "acute," you might wonder about other words that mean "sudden."

• 急な (kyuu na): This also means "sudden," but it's more general. You can use it for sudden changes, sudden events, or sudden slopes. It doesn't always carry the connotation of "severe" or "medical" like 急性の does.

  急な雨が降ってきた。

  Kyuu na ame ga futtekita.

  Sudden rain started falling.

• 突然の (totsuzen no): This also means "sudden" and emphasizes unexpectedness. It's similar to 急な but often implies a greater element of surprise.

  突然の訪問に驚いた。

  Totsuzen no houmon ni odoroita.

  I was surprised by the sudden visit.

The key difference is that 急性の is specifically for things that are sudden *and severe*, often in a medical or critical context. When you're talking about a sudden illness, pain, or condition, 急性の is the correct word to use.

Keep practicing these examples, and you'll get comfortable using 急性の correctly in your Japanese conversations and writing.

§ Understanding 急性の (kyūsei no)

You've learned that 急性の (kyūsei no) means 'acute,' like a sudden and severe illness. Now, let's look at where you'll actually encounter this word in real-world Japanese. It's most common in medical contexts, news reports, and sometimes in discussions about social issues.

§ In Medical Settings

This is where 急性の (kyūsei no) shines. When talking about illnesses, injuries, or conditions, 'acute' is a very important distinction from 'chronic.' You'll hear doctors, nurses, and even patients use it.

DEFINITION

急性胃炎 (kyūsei ien): acute gastritis

This refers to a sudden inflammation of the stomach lining. It's a common medical term.

Hint: He was hospitalized due to acute gastritis.

DEFINITION

急性虫垂炎 (kyūsei chūsuien): acute appendicitis

Another common medical condition. 'Appendicitis' alone doesn't convey the sudden, severe nature.

Hint: She was diagnosed with acute appendicitis.

§ In News and Reports

Beyond direct medical reports, the news often covers events where 'acute' symptoms or situations arise. This can include public health announcements or reports on incidents.

DEFINITION

急性症状 (kyūsei shōjō): acute symptoms

When health authorities are reporting on a sudden outbreak or a new disease, they will often refer to the 'acute symptoms' that appear quickly.

Hint: Many infected people are showing acute symptoms.

DEFINITION

急性期 (kyūseiki): acute phase

This term refers to the initial, most severe stage of an illness or condition. It's often used when describing patient care or recovery stages.

Hint: Treatment during the acute phase is important.

§ Less Common, but Possible

While mainly medical, you might encounter 急性の (kyūsei no) in more figurative ways, though it's less common than in English. For example, talking about 'acute social problems' or 'acute financial crisis' is less frequent with 急性の (kyūsei no) and more often handled by other Japanese words that convey urgency or severity.

• For 'acute social problems,' you might hear 深刻な社会問題 (shinkokuna shakai mondai - serious social problems) or 喫緊の課題 (kikkin no kadai - urgent issues).
• For 'acute financial crisis,' words like 深刻な財政危機 (shinkokuna zaisei kiki - serious financial crisis) or 緊急の財政問題 (kinkyū no zaisei mondai - emergency financial problems) are more typical.

Stick to medical contexts for 急性の (kyūsei no) as you learn. This is where it's most naturally and frequently used by native speakers.

§ What 急性の means

You're learning Japanese, and you come across a word like 急性の (kyuusei no). What does it mean, and how do you use it? Let's break it down.

Japanese Word

急性の (kyuusei no)

Part of Speech

Adjective

CEFR Level

B1

Definition

Acute; sudden and severe.

Basically, 急性の (kyuusei no) describes something that happens suddenly and intensely, often in a medical context, but not always. Think of it as the opposite of something chronic or gradual.

§ Examples of 急性の in use

Let's look at some practical examples to see how 急性の works in sentences.

I went to the hospital with acute abdominal pain.

He had an acute allergic reaction.

If acute symptoms appear, you should see a doctor immediately.

§ Similar words and when to use 急性の vs alternatives

When talking about things that are sudden or severe, you might encounter other Japanese words. Let's compare 急性の with some common alternatives.

• 突然の (totsuzen no): This also means 'sudden', but it's more general and can apply to any sudden event, not necessarily one with severity or a medical connotation.

It was a sudden event.

Here, 突然の works well because it's a general suddenness. You wouldn't typically say 急性の出来事 unless the event was also severe or critical.

• 激しい (hageshii): This means 'intense', 'violent', or 'severe'. It focuses on the intensity rather than the suddenness. While acute conditions are often intense, 激しい can describe sustained intensity too.

It rained heavily (intensely).

You could have 急性の雨 (kyuusei no ame) in a very specific, medical or scientific context if the rain *onset* was sudden and severe, but 激しい雨 is more natural for describing heavy rain.

• 重篤な (juutokuna): This means 'serious' or 'severe', often used for illnesses or conditions. It emphasizes the gravity of the situation.

He contracted a serious illness.

While an acute illness can be serious, 重篤な specifically highlights the severity, whereas 急性の focuses on the sudden onset and usually implies severity.

In summary, 急性の (kyuusei no) is a precise term. It's often paired with medical conditions to indicate a rapid, severe onset. Knowing these distinctions will help you choose the most appropriate word in different situations and sound more natural in Japanese.