A1 noun Neutral #3,466 most common

電気

denki [deŋkʲi]

Denki refers to electricity as a form of energy or the electric lights in a room. It is a fundamental word used both for power and for the everyday action of turning lights on and off.

Examples

3 of 5
1

部屋の電気をつけてください。

Please turn on the light in the room.

2

電気代のお支払いについてのご案内です。

This is a notice regarding the payment of your electricity bill.

3

あ、電気消すの忘れた!

Oh, I forgot to turn off the light!

Word Family

Noun
電気
Adjective
電気の
Related
電子
💡

Memory Tip

Remember that 'Den' comes from the kanji for lightning (電). Lightning is nature's electricity!

Quick Quiz

寝る前に___を消してください。

Correct!

The correct answer is: 電気

Examples

1

部屋の電気をつけてください。

everyday

Please turn on the light in the room.

2

電気代のお支払いについてのご案内です。

formal

This is a notice regarding the payment of your electricity bill.

3

あ、電気消すの忘れた!

informal

Oh, I forgot to turn off the light!

4

電気エネルギーは磁力に変換することができます。

academic

Electrical energy can be converted into magnetic force.

5

当社は新しい電気自動車のプロジェクトを開始しました。

business

Our company has started a new electric vehicle project.

Word Family

Noun
電気
Adjective
電気の
Related
電子

Common Collocations

電気をつける to turn on the light
電気を消す to turn off the light
電気代 electricity bill
電気製品 electrical appliances
電気自動車 electric car

Common Phrases

電気系統

electrical system

電気工事

electrical work

電気屋

electronics store / electrician

Often Confused With

電気 vs 天気

Tenki means 'weather', while Denki means 'electricity'. They only differ by the first consonant sound.

電気 vs 元気

Genki means 'energy/health' in a personal or physical sense, whereas Denki is literal electrical energy.

📝

Usage Notes

Use 'tsukeru' for turning on the light and 'kesu' for turning it off. In casual conversation, 'denki' often implies the overhead light in a room.

⚠️

Common Mistakes

Learners often say 'hiraku' (to open) or 'shimeru' (to close) for lights, but you must use 'tsukeru' and 'kesu'.

💡

Memory Tip

Remember that 'Den' comes from the kanji for lightning (電). Lightning is nature's electricity!

📖

Word Origin

Derived from the Chinese characters 電 (lightning) and 気 (spirit/energy/air).

Grammar Patterns

Noun + を + つける/けす (direct object) Noun + 代 (suffix for cost/bill) Noun + 屋 (suffix for shop/person)
🌍

Cultural Context

In Japan, there is a strong cultural emphasis on 'setsuden' (saving electricity), especially during peak summer and winter months.

Quick Quiz

寝る前に___を消してください。

Correct!

The correct answer is: 電気

Related Words

保護

A1

The act of keeping someone or something safe from harm, damage, or loss by providing care or creating boundaries. It is a versatile term in Japanese used for social welfare, environmental conservation, and digital security.

革命

A1

A fundamental and sudden change in political power or social structure, often involving a shift in governance. It also refers to a major, transformative shift in technology, thought, or a specific field that completely alters how things are done.

拡大

A1

The act of making something larger in size, scale, or scope. It is frequently used for physical enlargement (like a photo) or abstract growth (like a business or a problem).

販売

A1

The act of selling goods or services to customers, typically within a commercial or professional context. It refers to the business process of making items available for purchase.

取引

A1

A transaction or business deal involving the exchange of money, goods, or services. It refers to the process of doing business with another party or making a trade.

貯金

A1

The act of saving money or the amount of money saved, typically in a bank or a piggy bank. It refers to setting aside funds for future use rather than spending them immediately.

借金

A1

A sum of money that is borrowed from a person or an institution and is expected to be paid back. It refers to the state of owing money or the specific amount of debt accumulated.

利益

A1

Refers to the financial profit a company or individual makes after deducting expenses. It also describes a general benefit, advantage, or gain that someone receives from a situation or action.

損失

A1

A formal noun referring to the loss of something valuable, such as money, property, or time. It is commonly used in business or serious contexts to describe a reduction in value or a disadvantageous outcome.

予算

A1

A budget or an estimate of the amount of money available for a specific purpose. It refers to the financial plan or limit set before spending occurs in personal, business, or government contexts.

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