decomposition
gb/dˌikəmpoʊzˈɪʃən/ us/dˌikəmpoʊzˈɪʃən/
B2
英語
語義
0件の語義
名詞
B2
process
1
natural breakdown of organic matter
the process of rotting and breaking down naturally
用法パターン：
decomposition of [organic material]
よくある間違い：
Often confused with decomposition meaning “analysis” or “breaking a problem into parts.”
類義語
decay (More general and common; less scientific.)
|
rotting (More informal and vivid.)
対義語
preservation (Keeping something from decaying.)
コロケーション
organic decomposition
|natural decomposition
|rapid decomposition
|slow decomposition
|the decomposition of leaves
|the decomposition of wood
|the decomposition of waste
|decomposition in soil
|decomposition in water
|decomposition occurs
テーマ
nature
|science
|environment
例文
- Decomposition of fallen leaves returns nutrients to the soil.
- Warm, wet conditions speed up decomposition.
- In a compost bin, decomposition happens faster when the pile is turned regularly.
学習者向け例文
- Food decomposition can smell bad.
- Leaves decompose in the ground.
名詞
formal
C1
state
2
being partly or fully decayed
the condition of being rotten or decayed
用法パターン：
in (a) decomposition; in a state of decomposition
よくある間違い：
Learners may use decomposition as a countable noun (*a decomposition*) in this sense; it is usually uncountable.
類義語
decay (Broader; not as specific to post-death contexts.)
|
putrefaction (More technical and strongly associated with dead tissue.)
対義語
freshness (The opposite condition of not being decayed.)
コロケーション
advanced decomposition
|visible decomposition
|signs of decomposition
|stages of decomposition
|a state of decomposition
|the body showed decomposition
|early decomposition
|severe decomposition
|postmortem decomposition
|odor of decomposition
テーマ
health
|crime
|science
例文
- The remains were found in an advanced state of decomposition.
- Because of the heat, decomposition was already noticeable after a few days.
- The report described the extent of decomposition at the scene.
学習者向け例文
- The meat was in decomposition.
- The body was in a state of decomposition.
名詞
C1
process
3
breaking something into smaller parts
dividing something difficult into smaller parts to study it
用法パターン：
decomposition of [a problem/task/system] (into [parts])
よくある間違い：
Not used for physical damage; for physical breaking, learners often want “breakage” or “damage.”
類義語
breakdown (More common and less formal; can also mean a failure.)
|
analysis (Focuses on studying something, not necessarily splitting it into parts.)
対義語
synthesis (Combining parts to form a whole.)
コロケーション
problem decomposition
|task decomposition
|decomposition into parts
|decomposition into steps
|logical decomposition
|step-by-step decomposition
|decomposition of an argument
|decomposition of a process
|functional decomposition
|decomposition approach
テーマ
education
|work
|problem_solving
例文
- A clear decomposition of the problem helped the team find a solution.
- The course teaches decomposition: turning a big task into smaller, manageable steps.
- Her essay begins with a careful decomposition of the author’s argument.
学習者向け例文
- We used decomposition to solve the problem.
- Break the task down with decomposition.
名詞
technical
C1
process
4
chemical breakdown into simpler substances
a reaction where one chemical becomes simpler chemicals
用法パターン：
decomposition of [a compound] (into [products])
よくある間違い：
In chemistry, decomposition is a type of reaction, not just “rotting.”
類義語
breakdown (More general; can describe chemical change without naming the reaction type.)
対義語
synthesis (A reaction where simpler substances combine to form a compound.)
コロケーション
chemical decomposition
|thermal decomposition
|photochemical decomposition
|decomposition reaction
|decomposition products
|decomposition temperature
|catalytic decomposition
|decomposition pathway
|decomposition occurs
|undergo decomposition
テーマ
science
|chemistry
|education
例文
- At high temperatures, the compound undergoes decomposition into simpler gases.
- The lab measured the decomposition products released during heating.
- Light can cause the decomposition of some unstable chemicals.
学習者向け例文
- Heat caused decomposition of the chemical.
- The reaction was a decomposition.
名詞
technical
C1
abstract
5
representing something as component parts
writing a number or matrix as simpler parts
用法パターン：
decomposition of [a number/matrix] (into [components])
よくある間違い：
Often confused with “composition” in math (building a function), which is a different idea.
類義語
factorization (Common for numbers/polynomials; one specific type of decomposition.)
|
expansion (General term for rewriting in a sum/series; not always a decomposition.)
対義語
composition (Combining simpler mappings or parts to build a more complex object.)
コロケーション
prime decomposition
|matrix decomposition
|factor decomposition
|spectral decomposition
|decomposition into factors
|decomposition into eigenvalues
|decomposition theorem
|a decomposition method
|unique decomposition
|orthogonal decomposition
テーマ
math
|education
|technology
例文
- Prime decomposition expresses a number as a product of primes.
- The algorithm relies on a matrix decomposition to speed up computation.
- Students practiced decomposition to rewrite fractions in simpler forms.
学習者向け例文
- We used decomposition to factor the number.
- The matrix decomposition helped the calculation.
名詞
technical
C1
process
6
dividing a system into modules
splitting a system into smaller parts to build it
用法パターン：
decomposition of [a system/project] into [modules/components]
よくある間違い：
In project management, “decomposition” is not the same as “deadline breakdown”; it means dividing the work into parts.
類義語
modularization (Emphasizes designing as modules; common in software.)
|
partitioning (More general; can be used in systems, data, or networks.)
対義語
integration (Putting separate parts together into a unified system.)
コロケーション
functional decomposition
|system decomposition
|module decomposition
|architectural decomposition
|decomposition into components
|decomposition into services
|top-down decomposition
|design decomposition
|decomposition strategy
|decomposition diagram
テーマ
technology
|engineering
|business
例文
- The team used decomposition to split the application into independent services.
- Good decomposition makes complex projects easier to manage.
- The design document includes a decomposition of the system into core modules.
学習者向け例文
- We did decomposition to plan the project.
- Decomposition helped us build the system.
文法
辞書形
decomposition
IPA
GB/dˌikəmpoʊzˈɪʃən/
US/dˌikəmpoʊzˈɪʃən/
音節・強勢
de - com - pos - i - tion （5音節）
Stress on 4th syllable (i)
活用形
Noun
- Base: decomposition
- Plural: decomposition, decompositions
関連語
Forms
decompositions
noun
Core family
Related words
composer
noun B2
decomposer
noun
Advanced or less common
decomposable
adjective
表現
advanced state of decomposition
1/ədvˈænst stˈeɪt əv dˌikəmpoʊzˈɪʃən/
fixed phrase
formal
very far along in decay
very decayed
例文
- The remains were in an advanced state of decomposition.
- Because of the temperature, the animal carcass reached an advanced state of decomposition quickly.
- Investigators could not identify the body due to the advanced state of decomposition.
decomposition reaction
1/dˌikəmpoʊzˈɪʃən ɹiˈækʃən/
fixed phrase
technical
one compound splits into substances
a reaction where one chemical becomes two or more chemicals
例文
- The teacher gave an example of a decomposition reaction in which a compound breaks apart when heated.
- Electrolysis can drive a decomposition reaction.
- They identified the products of the decomposition reaction using spectroscopy.
functional decomposition
1/fˈʌŋkʃənəl dˌikəmpoʊzˈɪʃən/
fixed phrase
technical
splitting work into smaller functions
dividing a system into smaller jobs it does
例文
- Functional decomposition helped the team define clear responsibilities for each module.
- The report includes a functional decomposition of the manufacturing process.
- They started with functional decomposition before choosing the system architecture.
in a state of decomposition
1/ˈɪn ə stˈeɪt əv dˌikəmpoʊzˈɪʃən/
fixed phrase
formal
already decaying or rotting
already rotting
例文
- The body was in a state of decomposition when it was discovered.
- After several days in the heat, the fish were in a state of decomposition.
- The report noted that the remains were in a state of decomposition.
matrix decomposition
1/mˈeɪtɹɪks dˌikəmpoʊzˈɪʃən/
fixed phrase
technical
splitting a matrix into factors
rewriting a matrix using simpler matrices
例文
- The solver uses matrix decomposition to compute the solution efficiently.
- QR is one common type of matrix decomposition.
- They compared different matrix decomposition methods for numerical stability.
prime decomposition
1/pɹˈaɪm dˌikəmpoʊzˈɪʃən/
fixed phrase
technical
writing a number as primes
showing a number as a product of primes
例文
- Find the prime decomposition of 84.
- Prime decomposition helps you simplify fractions.
- The worksheet asked students to write a prime decomposition for each number.
rate of decomposition
1/ɹˈeɪt əv dˌikəmpoʊzˈɪʃən/
fixed phrase
technical
speed of decaying
how fast something decays
例文
- Scientists measured the rate of decomposition of leaf litter in different forests.
- Oxygen levels can affect the rate of decomposition in wetlands.
- The rate of decomposition increases when the soil is warm and moist.
thermal decomposition
1/θˈɚməl dˌikəmpoʊzˈɪʃən/
fixed phrase
technical
breakdown caused by heat
a chemical breaks apart because of heat
例文
- The experiment demonstrated thermal decomposition at 300°C.
- Thermal decomposition can produce gases that must be vented safely.
- Some plastics release toxic fumes during thermal decomposition.