imaginary
gb/ɪmˈæd͡ʒɪnˌɛɹi/ us/ɪmˈæd͡ʒɪnˌɛɹi/
B1
英語
~ 5700
képzeletbeli, képzelt, képzetes, képzetes szám
B1
1
képzeletbeli
B1
képzelt
B1
用法パターン：
an imaginary [thing/person/place]
As a child, she had an imaginary friend who went everywhere with her.
Gyerekkorában volt egy képzeletbeli barátja, aki mindenhova elkísérte.
The danger he described was mostly imaginary, not something we really needed to worry about.
Az általa leírt veszély nagyrészt csak képzelt volt, nem olyasmi, ami miatt valóban aggódnunk kellett volna.
The story takes place in an imaginary city somewhere in the Pacific.
He lives in an imaginary world where nothing ever goes wrong.
学習者向け例文
Many children talk to an imaginary friend.
Sok gyerek beszélget a képzeletbeli barátjával.
The monster under the bed is imaginary.
Az ágy alatti szörny csak képzeletbeli.
She wrote a story about an imaginary country.
His fears about losing his job were mostly imaginary.
よくある間違い：
Learners often confuse "imaginary" with "imaginative". "Imaginary" means not real and only in the mind, while "imaginative" describes a person who has a lot of creative ideas.
意味
not real, only in the mind
コロケーション
imaginary friend
|imaginary world
|purely imaginary
|imaginary line
|imaginary scenario
|largely imaginary
類義語
fictional (Often used for invented characters or stories in books, films, or games.)
|
unreal (Can mean not real in fact, but sometimes focuses more on something seeming strange or unbelievable.)
対義語
real (Emphasizes actual existence in the world, not just in the mind.)
|
actual (Stresses that something truly exists or happened, not just in thought or description.)
テーマ
thinking
|perception
|emotions
|core_vocabulary
定義
Not real; only in your mind, not in the real world.
Existing only in the mind and not actually present or real in the external world.
C1
TECHNICAL
2
képzetes
C1
用法パターン：
an imaginary [number/part/unit]
In this equation, x is a real number and y is an imaginary number.
Ebben az egyenletben x valós szám, y pedig képzetes szám.
Every complex number can be written as a real part plus an imaginary part.
Minden komplex szám felírható egy valós rész és egy képzetes rész összegeként.
The imaginary unit, usually written as i, is defined as the square root of minus one.
学習者向け例文
In algebra class we learned about imaginary numbers.
Az algebraórán képzetes számokról tanultunk.
A complex number has a real part and an imaginary part.
Egy komplex számnak van valós része és képzetes része.
The symbol i is used for the imaginary unit.
よくある間違い：
Learners sometimes think "imaginary" in math means the numbers are "fake" or "not important". In fact, imaginary numbers are well-defined and very important in higher mathematics, physics, and engineering.
意味
mathematical, involving √−1
コロケーション
imaginary number
|imaginary unit
|imaginary part
|imaginary axis
|imaginary component
類義語
non-real (Technical term in mathematics meaning not a real number; often used together with "imaginary" when classifying numbers.)
対義語
real (In mathematics, refers to numbers on the real number line, contrasted with imaginary numbers.)
テーマ
mathematics
|science
|education
定義
In math, used about numbers that include the special value √−1, called i, and are not real numbers.
In mathematics, involving or containing a multiple of the square root of minus one, usually represented by the symbol i in complex numbers.
名詞
C2
TECHNICAL
3
用法パターン：
an imaginary
In this context, z is a pure imaginary, with no real part.
Ebben az összefüggésben z tisztán képzetes szám, nincs valós része.
The solution of the equation is not a real number but an imaginary.
Az egyenlet megoldása nem valós szám, hanem képzetes szám.
Engineers often work with imaginaries when analyzing alternating current circuits.
学習者向け例文
The answer is not a real number; it is an imaginary.
A válasz nem valós szám, hanem képzetes szám.
In higher math, students learn about reals and imaginaries.
Felsőbb matematikában a diákok valós és képzetes számokról tanulnak.
This equation has two solutions, both of them imaginaries.
意味
an imaginary number in math
コロケーション
a pure imaginary
|positive imaginary
|negative imaginary
|imaginaries and reals
類義語
imaginary number (More explicit and more common in modern textbooks; "imaginary" as a noun is shorter and used in some technical writing.)
対義語
real number (A number that is not imaginary; lies on the continuous number line.)
テーマ
mathematics
|science
|education
定義
In math, an "imaginary" is a number that is a real number times √−1.
A number that can be written as a real number multiplied by the square root of minus one; an imaginary number.
文法
辞書形
imaginary
IPA
GB/ɪmˈæd͡ʒɪnˌɛɹi/
US/ɪmˈæd͡ʒɪnˌɛɹi/
音節・強勢
ima - gin - ary （3音節）
Stress on 2nd syllable (gin)
活用形
Adjective
- Base: imaginary
Noun
- Base: imaginary
- Plural: imaginaries
関連語
Forms
imaginaries
noun
Core family
Related words
imaginable
adjective
imaginatively
adverb
Negative and opposite forms
unimaginable
adjective C1
unimaginative
adjective
表現
imaginary friend
1/ɪmˈæd͡ʒɪnˌɛɹi fɹˈɛnd/
fixed phrase
a made-up friend in the mind
A friend that someone, especially a child, makes up in their mind and talks or plays with as if the friend is real.
例文
- Their daughter talks to her imaginary friend every night before bed.
- As a child, I had an imaginary friend who went on adventures with me.
imaginary line
1/ɪmˈæd͡ʒɪnˌɛɹi lˈaɪn/
fixed phrase
a non-physical dividing line
A line that people talk about for maps, borders, or explanations, but that you cannot see or touch in the real world.
例文
- The equator is an imaginary line around the middle of the Earth.
- There is an imaginary line between work and home that he tries not to cross with his problems.
imaginary number
1/ɪmˈæd͡ʒɪnˌɛɹi nˈʌmbɚ/
fixed phrase
technical
number involving √−1 in math
In math, a number that is a real number times √−1, written with the symbol i.
例文
- The equation x² + 1 = 0 has two imaginary numbers as solutions.
- Imaginary numbers are used together with real numbers to form complex numbers.
purely imaginary
1/pjˈʊɹli ɪmˈæd͡ʒɪnˌɛɹi/
fixed phrase
technical
complex number with no real part
In math, used for a complex number that has no real part, only an imaginary part.
例文
- If the real part is zero, the complex number is purely imaginary.
- The solutions to this equation are purely imaginary and lie on the vertical axis of the complex plane.