decisive
gb/dɪsˈaɪsɪv/ us/dɪsˈaɪsɪv/
B2
英語
~ 5500
語義
0件の語義
adjective
B2
property
1
deciding the result of something
Having a very strong effect that decides how something ends.
用法パターン：
[something] is decisive for [result]
よくある間違い：
Learners sometimes say *a very big victory* when *decisive victory* is more natural for a win that clearly decides the result. They may also confuse *decisive* with *decided*; *decisive victory* is correct, while *decided victory* is not natural in modern English.
類義語
crucial (Emphasizes great importance for the result, but not always that the result is clearly settled.)
|
determining (More formal and technical; focuses on directly causing a specific outcome.)
対義語
insignificant (Describes something that does not meaningfully affect the result.)
|
inconclusive (Describes evidence or results that do not clearly decide the outcome.)
コロケーション
decisive victory
|decisive defeat
|decisive factor
|decisive moment
|decisive role
|decisive battle
テーマ
politics
|sports
|business
|conflict
|core_vocabulary
例文
- The party won a decisive victory in the election, gaining more than two-thirds of the seats.
- Her goal in the final minute proved decisive for the championship.
- Funding was a decisive factor in the company’s rapid growth.
- The battle of Stalingrad was a decisive moment in the war.
- International pressure played a decisive role in ending the conflict.
学習者向け例文
- His last goal was decisive for the game.
- Money was a decisive factor in their choice of school.
- The test results were decisive in the doctor’s plan.
- Her support was decisive in the final decision.
- The third round was decisive, and he won the match.
adjective
B2
property
2
able to decide quickly and firmly
Able to decide things quickly and not change your mind easily.
用法パターン：
[someone] is decisive about [something]
よくある間違い：
Learners sometimes confuse *decisive* with *decided*. *Decisive person* means someone who can decide quickly; *decided person* is not natural. Also, do not say *make someone decisive* when you mean *help someone decide*; use *help someone make a decision* instead.
類義語
firm (Emphasizes not changing one’s decision rather than the speed of deciding.)
|
resolute (More formal and strong; stresses determination and not giving up.)
対義語
indecisive (Describes someone who has difficulty making choices or keeps changing their mind.)
|
hesitant (Focuses on slow, uncertain action instead of quick, firm decisions.)
コロケーション
a decisive leader
|decisive action
|take decisive action
|decisive management
|decisive attitude
テーマ
character
|work
|leadership
|core_vocabulary
例文
- She is a decisive manager who does not delay difficult choices.
- Voters are looking for a decisive leader in times of crisis.
- We need to take decisive action before the problem gets worse.
- His decisive response prevented a serious accident.
- Being decisive at work helped her get promoted quickly.
学習者向け例文
- My boss is very decisive and makes quick plans.
- He is not decisive, so small choices take him a long time.
- The coach was decisive and changed the team at half-time.
- Parents must be decisive when they set rules for children.
- In an emergency, a nurse has to be calm and decisive.
adjective
formal
C1
property
3
clear and leaving no doubt
So clear and strong that there is no doubt about what is true.
用法パターン：
[evidence/argument/result] is decisive
よくある間違い：
Learners may use *clear* or *sure* instead of *decisive* in formal writing. *Clear* is fine in everyday speech, but in academic or legal contexts *decisive* or *conclusive* is more precise when evidence fully settles a question.
類義語
conclusive (Very close in meaning; commonly used with evidence and proof, especially in formal or technical contexts.)
|
definitive (Suggests the final and best form, not likely to be changed.)
対義語
ambiguous (Describes something that can be understood in more than one way, so it does not settle the question.)
|
uncertain (Highlights that the result or conclusion is not clear or sure.)
コロケーション
decisive evidence
|decisive proof
|decisive argument
|decisive result
テーマ
law
|science
|argument
|communication
|core_vocabulary
例文
- The DNA test provided decisive evidence that cleared the suspect.
- There is no decisive proof linking the company to the fraud.
- The study’s findings are not yet decisive, so further research is needed.
- Her decisive argument convinced the committee to change its policy.
- The results are impressive but not decisive enough to end the debate.
学習者向け例文
- The video gave decisive proof that he was not there.
- We still do not have decisive results from the experiment.
- There is no decisive answer to this question yet.
- His facts were not decisive, so some people stayed unsure.
- The test did not give a decisive result, so they did it again.
文法
辞書形
decisive
IPA
GB/dɪsˈaɪsɪv/
US/dɪsˈaɪsɪv/
音節・強勢
de - cis - ive （3音節）
Stress on 2nd syllable (cis)
活用形
Adjective
- Base: decisive
関連語
Related words
decider
noun
Negative and opposite forms
表現
decisive action
1/dɪsˈaɪsɪv ˈækʃən/
fixed phrase
quick, firm, result-changing action
Action that is taken quickly and with a clear plan, and that strongly changes the situation.
例文
- The company took decisive action to cut costs and avoid bankruptcy.
- We must take decisive action now if we want to slow climate change.
decisive factor
1/dɪsˈaɪsɪv fˈæktɚ/
fixed phrase
main reason for the result
The most important reason why something happens or how it ends.
例文
- Price was the decisive factor in choosing the cheaper product.
- Weather conditions were a decisive factor in canceling the race.
decisive moment
1/dɪsˈaɪsɪv mˈoʊmənt/
fixed phrase
critical, result-changing moment
A very important time when something happens or a choice is made that changes what will happen after.
例文
- His injury in the final was a decisive moment in the tournament.
- For many voters, the debate was the decisive moment when they chose a candidate.
decisive role
1/dɪsˈaɪsɪv ɹˈoʊl/
fixed phrase
a key, result-changing role
A very important part in something that strongly changes how it ends.
例文
- International support played a decisive role in the peace talks.
- Her experience in finance had a decisive role in the success of the project.
decisive victory
1/dɪsˈaɪsɪv vˈɪktɚi/
fixed phrase
a clear and final win
A win that is very clear and strong, so there is no doubt about who is better or who wins.
例文
- The army's decisive victory ended the war.
- The team scored three goals in the second half and secured a decisive victory.
- It was a decisive victory that boosted the team's confidence.
- The polls show that the president won a decisive victory in the election.