B2 noun Neutral

principle

/ˈprɪn.sə.pəl/

A principle is a fundamental truth, law, or rule that serves as the foundation for a system of belief, behavior, or reasoning. It can also refer to a personal code of conduct that guides how an individual chooses to act in various situations.

Examples

3 of 5
1

I make it a principle to never borrow money from my friends or family.

I have a personal rule to avoid getting into debt with people close to me.

2

The legal system is built upon the principle that every person is innocent until proven guilty.

The core rule of law states that guilt must be demonstrated before someone is punished.

3

It's the principle of the thing; he shouldn't have taken credit for your hard work.

The moral aspect is what matters here, regardless of the actual outcome.

Word Family

Noun
principle
Adjective
principled
Related
principality
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Memory Tip

Think: A principLE is a ruLE. Both words end in the same two letters (-le).

Quick Quiz

The ______ of supply and demand is a fundamental concept in economics.

Correct!

The correct answer is: principle

Examples

1

I make it a principle to never borrow money from my friends or family.

everyday

I have a personal rule to avoid getting into debt with people close to me.

2

The legal system is built upon the principle that every person is innocent until proven guilty.

formal

The core rule of law states that guilt must be demonstrated before someone is punished.

3

It's the principle of the thing; he shouldn't have taken credit for your hard work.

informal

The moral aspect is what matters here, regardless of the actual outcome.

4

Le Chatelier's principle predicts how a chemical system at equilibrium responds to changes in conditions.

academic

This scientific law describes the behavior of chemical reactions under stress.

5

Our corporate strategy is guided by the principle of total transparency with our shareholders.

business

Our business approach is based on the fundamental rule of being completely open with investors.

Word Family

Noun
principle
Adjective
principled
Related
principality

Common Collocations

guiding principle a primary rule that influences how something is done
fundamental principle a basic and essential truth or law
stick to your principles to continue following your beliefs even when it is difficult
in principle agreeing with an idea in general, though perhaps not in every detail
a matter of principle something done because of a firm belief that it is the right thing to do

Common Phrases

on principle

because of a fixed belief regarding right and wrong

man of principle

a person who has high moral standards and sticks to them

basic principles

the simplest and most important parts of a subject or system

Often Confused With

principle vs principal

'Principal' refers to a person in charge (like a school head) or an original sum of money, while 'principle' refers to a rule or belief.

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Usage Notes

The word is almost always used to describe abstract concepts like laws of nature or moral codes. It is a countable noun, so you can have 'many principles'.

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Common Mistakes

The most frequent error is spelling 'principle' when the writer actually means 'principal'. Remember that 'principle' is a rule, whereas a 'principal' can be your 'pal' (a person).

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Memory Tip

Think: A principLE is a ruLE. Both words end in the same two letters (-le).

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Word Origin

From the Latin 'principium', meaning 'beginning, source, or foundation'.

Grammar Patterns

Countable noun: often used in the plural (principles) Commonly follows the preposition 'in' (in principle) Often followed by the preposition 'of' (the principle of...)
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Cultural Context

In many English-speaking cultures, being described as a 'person of principle' is a high compliment regarding one's integrity.

Quick Quiz

The ______ of supply and demand is a fundamental concept in economics.

Correct!

The correct answer is: principle

Related Words

index

B2

To organize information into a systematic list or database for easy retrieval, typically at the end of a book or within a computer system. In economics, it refers to adjusting a value or price according to a specific standard, such as inflation or the cost of living.

induce

B2

To succeed in persuading or influencing someone to do something. It also means to bring about or cause a specific physical condition or reaction to happen.

infer

B2

To reach a conclusion or form an opinion based on facts, evidence, or reasoning rather than on direct statements. It involves understanding a hidden meaning or 'reading between the lines' when information is not explicitly provided.

inhibit

B2

To hinder, restrain, or prevent an action or process from happening or developing. It is frequently used in scientific contexts to describe slowing down a chemical or biological reaction, as well as in psychology to describe the restraint of impulses.

initiate

B2

Describes someone who has been introduced to or instructed in a particular subject, group, or secret knowledge. It also refers to something that has been recently begun or is in an introductory stage.

inspect

B2

To examine something closely and officially to check its condition, quality, or compliance with standards. It involves a systematic and careful look to identify flaws or ensure everything is as it should be.

integrate

B2

To combine two or more things so that they work together effectively or become part of a whole. It also refers to the process of helping a person or group become part of a larger society or organization.

intrinsic

B2

Intrinsic refers to a quality or characteristic that is an essential and natural part of something. It describes properties that are inherent to an object or person, rather than being added or influenced by external forces.

invoke

B2

To call upon a spirit, a deity, or a person for help or inspiration. In legal and formal contexts, it means to cite a law, rule, or authority to support an argument or justify an action.

label

B2

To attach a tag or piece of information to an object to describe its contents or ownership. It also refers to the act of categorizing or describing someone or something in a specific, often oversimplified, way.

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