vapor
gb/vˈeɪpɚ/ us/vˈeɪpɚ/
B2
英語
~ 9700
語義
0件の語義
名詞
B2
entity
1
faint mist, steam, or fumes
A light cloud of tiny drops or particles in the air, like mist, steam, or fumes.
用法パターン：
vapor rises from [something]
よくある間違い：
Learners often confuse "vapor" with "smoke". "Smoke" usually comes from burning and often smells bad, while "vapor" can be just water or another substance changing from liquid to a light cloud in the air.
類義語
mist (Often suggests tiny water drops that you can see clearly, especially outdoors or in a bathroom.)
|
steam (Usually refers to hot water vapor from boiling or very hot water.)
|
fumes (Suggests unpleasant, often smelly or harmful vapor, especially from chemicals or fuel.)
対義語
clear air (Describes air without visible mist, steam, smoke, or other particles.)
コロケーション
water vapor
|thick vapor
|cloud of vapor
|vapor rises
|gasoline vapor
|white vapor
テーマ
science
|environment
|daily life
|nature
|core_vocabulary
例文
- A thin vapor rose from the wet street after the rain stopped.
- Cold air hit the hot tea, and a cloud of vapor curled above the cup.
- He could see gasoline vapor shimmering in the heat around the broken fuel line.
- The bathroom mirror fogged up with warm vapor after the shower.
- White vapor poured from the factory pipes on the cold morning.
学習者向け例文
- Vapor came from the hot soup.
- I can see my breath as white vapor in the cold air.
- Warm vapor fills the room when I take a hot shower.
- A cloud of vapor slowly rose from the wet ground.
- Thick vapor covered the lake early in the morning.
unknown
technical
C1
entity
2
gas form of a substance
The gas form of a substance that is usually a liquid or a solid, especially in science.
用法パターン：
[substance] vapor
よくある間違い：
Learners sometimes think "vapor" and "gas" are always the same. In everyday English they are very close, but in chemistry, "vapor" is often used for the gas form of substances that are normally liquid or solid at room conditions.
類義語
gas (A more general scientific term; in chemistry, "vapor" is often used for the gaseous form of substances that are usually liquid or solid.)
対義語
liquid (Describes the condensed state of a substance, which is the opposite of its vapor or gas form.)
|
solid (Another condensed state that contrasts with the gaseous vapor state.)
コロケーション
water vapor
|mercury vapor
|fuel vapor
|vapor pressure
|vapor phase
|vapor density
テーマ
science
|technology
|engineering
|core_vocabulary
例文
- As the temperature rises, more water changes into water vapor in the atmosphere.
- The experiment measures the vapor pressure of the liquid at different temperatures.
- Fuel vapor in the tank must be carefully controlled to prevent explosions.
- Mercury vapor can be highly toxic if inhaled in a closed space.
- The substance exists as a vapor at room temperature but condenses when cooled.
学習者向け例文
- Water becomes water vapor when it boils.
- In this test, we measure the vapor that comes from the liquid.
- The tank holds fuel vapor above the liquid gasoline.
- When the vapor cools, it turns back into liquid.
- Scientists study how much vapor is in the air.
名詞
literary
C2
state
3
old term for faintness or hysteria
An old-fashioned word, usually in the form "the vapors," meaning a sudden feeling of weakness or strong emotion that makes someone feel like they might faint.
用法パターン：
have the vapors
よくある間違い：
Learners may think this meaning of "vapors" is modern or medical. It is now mostly humorous, literary, or historical and should generally be avoided in serious contemporary writing or speech.
類義語
faintness (Focuses on the physical feeling of almost losing consciousness.)
|
hysteria (Suggests uncontrolled emotion; historically, both terms were often used in a gendered and now outdated way.)
対義語
composure (Describes a calm, controlled emotional state, which contrasts with being overcome by the vapors.)
コロケーション
have the vapors
|get the vapors
|give [someone] the vapors
|suffer from the vapors
テーマ
emotions
|literature
|health
例文
- In the old novel, the lady claimed she had the vapors and asked for a chair.
- The shocking news nearly gave her the vapors, at least in her dramatic telling of it.
- Servants rushed to open a window when their mistress complained of the vapors.
- He joked that the sight of the bill would give his mother the vapors.
- The character was forever suffering from the vapors in that nineteenth‑century play.
学習者向け例文
- In this old story, the woman says she has the vapors.
- He uses the word "vapors" as a joke when he feels shocked.
- The doctor in the book says the young lady has the vapors.
- People do not use the word "vapors" like this in modern speech.
- The film shows a woman who gets "the vapors" and has to lie down.
文法
辞書形
vapor
IPA
GB/vˈeɪpɚ/
US/vˈeɪpɚ/
音節・強勢
va - por （2音節）
Stress on 1st syllable (va)
活用形
Noun
- Base: vapor
- Plural: vapor, vapors
関連語
Forms
vapors
noun
Core family
vaporize
verb
vaporization
noun
Related words
Advanced or less common
vaporous
adjective
表現
fuel vapor
1/fjˈul vˈeɪpɚ/
fixed phrase
technical
vapor form of fuel
Fuel, such as gasoline, that has turned into vapor and can burn or explode easily.
例文
- The tank is designed to capture fuel vapor and reduce pollution.
- A small spark can ignite fuel vapor in a closed space.
- Mechanics checked for fuel vapor leaks around the engine.
vapor barrier
1/vˈeɪpɚ bˈɛɹiɚ/
fixed phrase
technical
material layer blocking moisture
A special layer in a building that stops water vapor from moving through walls, floors, or roofs.
例文
- Builders installed a plastic vapor barrier behind the drywall.
- A good vapor barrier helps prevent mold inside the walls.
- The contractor recommended adding a vapor barrier under the new floor.
vapor cloud
1/vˈeɪpɚ klˈaʊd/
fixed phrase
technical
large mass of vapor in air
A large group or "cloud" of vapor in the air, often from a chemical or fuel leak.
例文
- The factory leak created a toxic vapor cloud over the area.
- Emergency crews tracked the movement of the vapor cloud with sensors.
- A flammable vapor cloud can explode if it finds an ignition source.
vapor lock
1/vˈeɪpɚ lˈɑk/
fixed phrase
technical
fuel flow blocked by vapor
A problem in an engine’s fuel system where fuel changes to vapor and stops the fuel from moving correctly.
例文
- The old car stalled on the hill because of vapor lock in the fuel line.
- High temperatures can increase the risk of vapor lock in aircraft engines.
- Mechanics checked the fuel pump after repeated vapor lock issues.
vapor phase
1/vˈeɪpɚ fˈeɪz/
fixed phrase
technical
state where substance is vapor
The state in which a substance exists as a vapor, not as a liquid or solid.
例文
- The reaction occurs mainly in the vapor phase at high temperatures.
- Engineers measured the concentration of the chemical in the vapor phase.
- In the vapor phase, molecules are far apart and move freely.
vapor pressure
1/vˈeɪpɚ pɹˈɛʃɚ/
fixed phrase
technical
pressure from a vapor
The pressure made by a vapor in a closed space when it is in balance with its liquid or solid form.
例文
- The boiling point of a liquid depends on its vapor pressure.
- Students learned how temperature affects the vapor pressure of water.
- Substances with high vapor pressure evaporate more easily.
vapor trail
1/vˈeɪpɚ tɹˈeɪl/
fixed phrase
thin cloud behind airplane
A long, thin line of cloud in the sky that forms behind an airplane.
例文
- We watched the jet's vapor trail slowly spread across the blue sky.
- Several white vapor trails crisscrossed above the city at sunset.
- The plane left a bright vapor trail that faded after a few minutes.
water vapor
1/wˈɔtɚ vˈeɪpɚ/
fixed phrase
gaseous form of water
Water in gas form, usually invisible, that is in the air or in a closed space.
例文
- Clouds form when water vapor in the air cools and condenses.
- The bathroom is full of water vapor after a hot shower.
- Greenhouse gases and water vapor help trap heat in the atmosphere.