rationale
gb/ɹˌæʃənˈæl/ us/ɹˌæʃənˈæl/
C1
英語
~ 5700
語義
0件の語義
名詞
formal
C1
entity
1
underlying reason or justification
The main reason or explanation for why someone does something or believes something, especially in a careful or logical way.
用法パターン：
the rationale for [an action/decision]
よくある間違い：
Learners sometimes confuse "rationale" (noun) with "rational" (adjective). For example, *"a rationale person"* is incorrect; it should be *"a rational person"*. Another mistake is using it without an article in singular countable use; in most cases you need an article: say *"the rationale"* or *"a clear rationale"*, not just *"rationale"* alone.
類義語
reason (More general and common; does not always suggest careful or logical thinking the way "rationale" often does.)
|
justification (Emphasizes defending or proving that an action is right, often in response to criticism.)
|
logic (Focuses on the structure of the argument or thinking, not the explanation as a whole.)
対義語
irrationality (Highlights the lack of logical reasons or justification for a belief or action.)
コロケーション
the rationale behind
|the rationale for
|clear rationale
|sound rationale
|underlying rationale
|provide a rationale
テーマ
business
|law
|daily life
|academia
|communication
|education
|core_vocabulary
例文
- The company’s rationale for closing the branch was that it had been losing money for years.
- Parents were angry because the school gave no clear rationale for changing the exam schedule.
- Can you explain the rationale behind your choice of research method?
- His main rationale for moving abroad was the chance to give his children a better education.
- The government outlined its rationale for the new tax in a detailed press conference.
学習者向け例文
- She asked her boss to explain the rationale for the new rule.
- I do not understand the rationale behind his decision.
- The teacher gave a clear rationale for the homework.
- There is no good rationale for this policy.
- He tried to give a logical rationale for his actions.
名詞
formal
C1
entity
2
theoretical basis of a system
The formal explanation of why a system, plan, or program is made in a certain way.
用法パターン：
the rationale for [a system/plan/program]
よくある間違い：
Learners may use "rationale" here when "overview" or "summary" is meant. A rationale must explain the reasons or theory behind the structure, not just describe its parts. For example, *"This is the rationale of the book"* is unclear if it only lists chapters and does not explain why they are arranged that way.
類義語
theoretical basis (Highlights the academic or theoretical foundation more than the everyday explanatory aspect.)
|
framework (Suggests an overall structure of ideas; may be broader and less explicitly focused on reasons.)
対義語
randomness (Suggests that something is arranged without any planned structure or reasoning, the opposite of a planned rationale.)
コロケーション
course rationale
|design rationale
|policy rationale
|research rationale
|strategic rationale
|curriculum rationale
テーマ
academia
|planning
|education
|business
|work
|core_vocabulary
例文
- The course rationale explains how each module supports the overall learning goals.
- Before approving the project, the committee asked for a written rationale outlining its strategic importance.
- The design rationale shows why the product uses these materials and not cheaper alternatives.
- Researchers must include a clear rationale for their chosen methods in the proposal.
- The policy rationale is to reduce traffic congestion while promoting public transport.
学習者向け例文
- The teacher gave us the course rationale on the first day.
- You should write a short rationale for your study plan.
- The manager asked for the business rationale of the new project.
- This document is the rationale for the new school program.
- Please read the rationale before you look at the detailed plan.
文法
辞書形
rationale
IPA
GB/ɹˌæʃənˈæl/
US/ɹˌæʃənˈæl/
音節・強勢
ra - tionale （2音節）
活用形
Noun
- Base: rationale
- Plural: rationales
関連語
Forms
rationales
noun
Core family
Related words
rationalize
verb
rationalization
noun
Negative and opposite forms
Advanced or less common
rationalism
noun C1
rationalist
noun
表現
the rationale behind something
1/ðə ɹˌæʃənˈæl bɪhˈaɪnd sˈʌmθɪŋ/
fixed phrase
formal
the reason or logic supporting something
the main reason or logical explanation for something, especially a decision, rule, or plan
例文
- Citizens are confused about the rationale behind the new immigration rules.
- The report sets out the rationale behind the company’s decision to close two factories.
- Could you clarify the rationale behind these safety procedures for the staff?
the rationale for something
1/ðə ɹˌæʃənˈæl fɚ sˈʌmθɪŋ/
fixed phrase
formal
the justification for something
the main reason or logical support for a plan, action, or rule
例文
- The minister explained the rationale for increasing fuel taxes.
- We need to make the rationale for these changes very clear to our customers.
- The document outlines the rationale for the new training program.