theory
gb/θˈiɚi/ us/θˈiɚi/
B1
อังกฤษ
~ 700
ความหมาย
0 ความหมาย
คำนาม
B2
entity
1
Explanation supported by evidence
An idea that explains why things happen, based on facts and study.
รูปแบบการใช้:
a theory about [something]
ข้อผิดพลาดที่พบบ่อย:
Learners sometimes confuse 'theory' with 'hypothesis'. A hypothesis is an idea to be tested; a theory is already supported by evidence.
คำพ้องความหมาย
explanation (More general; can be for everyday situations, not just formal or scientific contexts.)
คำตรงข้าม
fact (A fact is something known to be true without the need for explanation or hypothesis.)
คำที่ใช้ร่วมกัน
scientific theory
|develop a theory
|theory suggests
|test a theory
|propose a theory
หัวข้อ
science
|education
|research
|core_vocabulary
ตัวอย่าง
- Einstein's theory of relativity changed our understanding of space and time.
- The theory explains how galaxies form.
- Her theory is that the missing money was stolen by someone inside the company.
- The researchers developed a new theory to explain the results.
- According to current theory, the universe began with the Big Bang.
ตัวอย่างสำหรับผู้เรียน
- I read about a new theory in science class.
- Her theory is that plants grow faster in sunlight.
- The theory says the earth goes around the sun.
- Scientists have a theory about why animals migrate.
คำนาม
B2
entity
2
General ideas or principles
An idea or set of rules about how something works or should work.
รูปแบบการใช้:
theory of [something]
ข้อผิดพลาดที่พบบ่อย:
Learners sometimes use 'in theory' incorrectly to mean 'probably' instead of 'according to the plan or idea'.
คำพ้องความหมาย
principle (Refers to a basic truth or rule; may be more fixed than 'theory'.)
คำตรงข้าม
practice (Refers to the actual doing of something, as opposed to the ideas about it.)
คำที่ใช้ร่วมกัน
political theory
|economic theory
|management theory
|in theory
หัวข้อ
philosophy
|education
|work
|core_vocabulary
ตัวอย่าง
- In theory, this plan should save the company money.
- She studies political theory at university.
- The new economic theory challenges traditional views.
- According to game theory, players act in their own interest.
ตัวอย่างสำหรับผู้เรียน
- In theory, the train should arrive at 8.
- We learned about economic theory in class.
- His theory is that people are happier in small towns.
คำนาม
B1
entity
3
Unproven belief or guess
A guess or idea that might explain something, but is not certain.
รูปแบบการใช้:
have a theory that [clause]
ข้อผิดพลาดที่พบบ่อย:
Learners may overuse 'theory' for casual guesses; 'idea' or 'guess' can be more natural in informal speech.
คำพ้องความหมาย
speculation (More formal; often suggests guessing without strong evidence.)
คำตรงข้าม
certainty (Something known for sure, without doubt.)
คำที่ใช้ร่วมกัน
have a theory
|my theory is that
|conspiracy theory
หัวข้อ
daily life
|communication
|core_vocabulary
ตัวอย่าง
- I have a theory that my neighbor is avoiding me.
- Her theory is that the cat goes out at night to hunt.
- There's a popular conspiracy theory about that event.
ตัวอย่างสำหรับผู้เรียน
- I have a theory that it will rain today.
- His theory is that she is tired.
- They talk about a strange conspiracy theory.
ไวยากรณ์
รูปคำในพจนานุกรม
theory
IPA
GB/θˈiɚi/
US/θˈiɚi/
พยางค์และการเน้นเสียง
the - ory (2 พยางค์)
Stress on 1st syllable (the)
รูปคำ
Noun
- Base: theory
- Plural: theories, theory
กลุ่มคำที่เกี่ยวข้อง
Forms
theories
noun
Core family
theoretical
adjective B2
theoretically
adverb B2
วลีและสำนวน
conspiracy theory
1/kənspˈɪɹəsi θˈiɚi/
fixed phrase
belief about secret harmful plot
An explanation of an event that says a secret group planned it for a bad reason, usually without good proof.
ตัวอย่าง
- Some people believe the moon landing was a conspiracy theory.
- The internet has made it easier for conspiracy theory videos to reach millions of people.
- The internet has made it easier for conspiracy theories to spread.
- He dismissed the idea that the vaccine is a government plot as a wild conspiracy theory.
- Some conspiracy theory communities moved to new platforms after being banned.
in theory
1/ˈɪn θˈiɚi/
fixed phrase
According to ideas or plans
When something should happen based on ideas or plans, but it might not happen in real life.
ตัวอย่าง
- In theory, this method should work every time.
- In theory, the plan should work perfectly.
- In theory, anyone can apply for the job, but few are qualified.
- In theory, anyone can apply for the job, but in practice it’s very competitive.
in theory
2/ˈɪn θˈiɚi/
fixed phrase
according to theory, not practice
According to ideas or rules of how something should work, not necessarily how it really works.
ตัวอย่าง
- In theory, the new law will reduce traffic, but many people doubt it.
- The plan sounds perfect in theory, but it will be hard to carry out.
- In theory, children learn faster with smaller classes.