
When learning Chinese, many students feel confused by words that look similar but are used differently in real situations. Today, we are going to look at three very common words:
严肃 (yánsù)
严厉 (yánlì)
严格 (yángé)
All three are related to the idea of being “serious” or “strict,” but their meanings are not the same.
If you mix them up, your Chinese may sound unnatural.
So let’s make them clear one by one. 😊
1. 严肃 (yánsù)
Core Meaning
严肃 (yánsù) means serious, solemn, or not joking.
It is usually used to describe:
-
a person’s expression
-
a person’s attitude
-
a topic
-
an atmosphere
-
a situation
Simple Understanding
When something is 严肃 (yánsù), the focus is on seriousness in tone, mood, or attitude.
It does not mainly mean “strict with rules.”
Common Expressions
-
严肃的表情
(yánsù de biǎoqíng) — a serious expression
-
严肃的态度
(yánsù de tàidu) — a serious attitude
-
严肃的问题
(yánsù de wèntí) — a serious problem
-
严肃的话题
(yánsù de huàtí) — a serious topic
Example Sentences
1. 老师上课的时候很严肃,很少开玩笑。
English: The teacher is very serious during class and rarely jokes.
2. 这是一个非常严肃的问题,我们需要认真讨论。
English: This is a very serious issue, and we need to discuss it carefully.
3. 听到这个消息以后,他的表情马上变得很严肃。
English: After hearing the news, his expression immediately became very serious.
Usage Tip
If you say:
老师很严肃。
Lǎoshī hěn yánsù.
It means the teacher looks serious or has a serious manner.
It does not necessarily mean the teacher is strict with students.

2. 严厉 (yánlì)
Core Meaning
严厉 (yánlì) means stern, harsh, or severe.
It is often used when talking about:
-
criticism
-
punishment
-
warnings
-
tone of voice
-
reaction to mistakes or bad behavior
Simple Understanding
When someone is 严厉 (yánlì), the feeling is usually stronger and heavier than 严肃 (yánsù).
It often includes the idea of:
-
blame
-
pressure
-
punishment
-
strong correction
Common Expressions
-
严厉地批评
(yánlì de pīpíng) — to criticize severely
-
严厉地警告
(yánlì de jǐnggào) — to warn sternly
-
严厉的处罚
(yánlì de chǔfá) — severe punishment
-
严厉的语气
(yánlì de yǔqì) — a stern tone
Example Sentences
1. 因为他经常迟到,经理严厉地批评了他。
English: Because he was often late, the manager criticized him severely.
2. 父亲用很严厉的语气告诉他,不能再这样做了。
English: His father told him in a very stern tone that he could not do that again.
3. 学校对考试作弊的学生采取了严厉的处罚。
English: The school gave severe punishment to students who cheated on the exam.
Usage Tip
If you say:
老师很严厉。
Lǎoshī hěn yánlì.
It means the teacher is stern or harsh, especially when students make mistakes.
This word often sounds stronger and more stressful than 严肃.

3. 严格 (yángé)
Core Meaning
严格 (yángé) means strict.
It is used for:
-
rules
-
standards
-
requirements
-
discipline
-
management
-
self-discipline
Simple Understanding
When something is 严格 (yángé), the focus is on clear rules and high standards.
This word is not mainly about emotion.
It is about whether rules or requirements are tight.
Common Expressions
-
严格要求
(yángé yāoqiú) — to demand strictly
-
严格遵守
(yángé zūnshǒu) — to strictly follow
-
管理严格
(guǎnlǐ yángé) — strict management
-
对自己很严格
(duì zìjǐ hěn yángé) — to be strict with oneself
Example Sentences
1. 这个学校对学生的出勤要求非常严格。
English: This school is very strict about students’ attendance requirements.
2. 医生说,吃药的时候一定要严格按照说明来。
English: The doctor said that when taking medicine, you must follow the instructions strictly.
3. 她对自己一直很严格,所以进步很快。
English: She has always been very strict with herself, so she has made progress quickly.
Usage Tip
If you say:
老师很严格。
Lǎoshī hěn yángé.
It means the teacher has strict standards or rules.
It does not necessarily mean the teacher looks serious or speaks harshly.

4. A Quick Comparison
Now let’s compare these three sentences:
老师很严肃。
Lǎoshī hěn yánsù.
The teacher is serious.
→ Focus on expression, attitude, or classroom atmosphere.
老师很严厉。
Lǎoshī hěn yánlì.
The teacher is stern.
→ Focus on criticism, blame, or harsh treatment.
老师很严格。
Lǎoshī hěn yángé.
The teacher is strict.
→ Focus on rules, standards, and expectations.
This is the easiest way to remember the difference.

5. Common Mistakes
Mistake 1: Using 严厉 for a problem or topic
❌ 严厉的问题
This sounds unnatural.
✅ 严肃的问题
a serious problem
Why?
Because a problem can be serious, but it is not usually described as harsh.
Mistake 2: Using 严格 for atmosphere
❌ 气氛很严格
This sounds unnatural.
✅ 气氛很严肃
The atmosphere is serious.
Why?
Because 严格 (yángé) is mainly for rules and standards, not atmosphere.
Mistake 3: Mixing up 严厉 and 严格
Compare these two:
学校管理很严格。
Xuéxiào guǎnlǐ hěn yángé.
The school management is strict.
→ The rules and system are strict.
老师批评学生的时候很严厉。
Lǎoshī pīpíng xuéshēng de shíhou hěn yánlì.
The teacher is stern when criticizing students.
→ The criticism is harsh.

6. Easy Memory Tip
You can remember them like this:
严肃 (yánsù) = serious face / serious topic
严厉 (yánlì) = harsh criticism / severe punishment
严格 (yángé) = strict rule / strict standard
If you use this method, it becomes much easier to choose the right word. ✨
Chinese has many words that look similar, but each one has its own feeling and usage.
That is why learning the small differences is so important.
Did you use these three words correctly before? 😊
You can try making your own sentence with:
严肃 (yánsù)
严厉 (yánlì)
严格 (yángé)