C1 · Advanced

Conflict & Diplomacy — C1 English Vocabulary

This C1 vocabulary list gathers 60 advanced English words about conflict & diplomacy — war, peace and negotiation. Every word comes with a simple definition, its British-English pronunciation and a natural example sentence, so you learn each one in real context. When you are ready, open the flashcards to practise and remember them for good.

60 wordsBritish pronunciationExample sentencesDefinitionsFree flashcards
  1. détente/deɪˈtɒnt/

    The easing of tension between countries.

    “The talks led to a brief détente.”

  2. rapprochement/ræˈprɒʃ.mɒ̃/

    The renewing of friendly relations between states.

    “The visit signalled a rapprochement.”

  3. accord/əˈkɔːd/

    A formal agreement between parties.

    “They signed a peace accord.”

  4. ultimatum/ˌʌl.tɪˈmeɪ.təm/

    A final demand with a threat if refused.

    “They issued an ultimatum.”

  5. overture/ˈəʊ.və.tʃə/

    An approach made to open discussions.

    “He made a peace overture.”

  6. envoy/ˈen.vɔɪ/

    An official messenger sent between governments.

    “A special envoy was sent.”

  7. emissary/ˈem.ɪ.sər.i/

    A person sent on a special mission for a government.

    “The king sent an emissary.”

  8. attaché/əˈtæʃ.eɪ/

    An official who assists an ambassador.

    “He is a military attaché.”

  9. consulate/ˈkɒn.sjə.lət/

    The office of a country's official in a foreign city.

    “She works at the consulate.”

  10. communiqué/kəˈmjuː.nɪ.keɪ/

    An official announcement or statement.

    “They issued a joint communiqué.”

  11. brinkmanship/ˈbrɪŋk.mən.ʃɪp/

    Pushing a dangerous situation to its limit.

    “It was reckless brinkmanship.”

  12. appeasement/əˈpiːz.mənt/

    The giving in to demands to avoid conflict.

    “Appeasement failed to stop the war.”

  13. nonaggression/ˌnɒn.əˈɡreʃ.ən/

    An agreement not to attack one another.

    “They signed a nonaggression pact.”

  14. demilitarise/diːˈmɪl.ɪ.tər.aɪz/

    To remove armed forces from an area.

    “They agreed to demilitarise the zone.”

  15. disarmament/dɪsˈɑː.mə.mənt/

    The reduction of a country's weapons.

    “Nuclear disarmament is the goal.”

  16. proliferation/prəˌlɪf.əˈreɪ.ʃən/

    The rapid spread of weapons.

    “They fear weapons proliferation.”

  17. belligerent/bɪˈlɪdʒ.ər.ənt/

    Aggressive and eager to fight.

    “He grew belligerent.”

  18. hostilities/hɒsˈtɪl.ɪ.tiz/

    Acts of war or fighting.

    “Hostilities resumed at dawn.”

  19. insurgent/ɪnˈsɜː.dʒənt/

    A rebel fighting against the government.

    “An insurgent group claimed it.”

  20. guerrilla/ɡəˈrɪl.ə/

    A fighter using small surprise attacks.

    “They fought a guerrilla war.”

  21. mercenary/ˈmɜː.sən.ər.i/

    A soldier who fights for money for any country.

    “A mercenary led the raid.”

  22. annihilate/əˈnaɪ.ə.leɪt/

    To destroy completely.

    “They threatened to annihilate the enemy.”

  23. atrocity/əˈtrɒs.ɪ.ti/

    An extremely cruel and violent act.

    “The atrocity shocked the world.”

  24. genocide/ˈdʒen.ə.saɪd/

    The deliberate killing of a whole people.

    “The court called it genocide.”

  25. reparations/ˌrep.əˈreɪ.ʃənz/

    Payments made for war damage.

    “They demanded reparations.”

  26. capitulation/kəˌpɪt.jəˈleɪ.ʃən/

    The act of surrendering.

    “His capitulation ended the siege.”

  27. blockade/blɒˈkeɪd/

    The sealing off of a place to stop supplies.

    “The blockade cut off supplies.”

  28. retaliation/rɪˌtæl.iˈeɪ.ʃən/

    The returning of an attack or injury.

    “They feared retaliation.”

  29. antagonise/ænˈtæɡ.ə.naɪz/

    To make someone hostile towards you.

    “Do not antagonise the rebels.”

  30. concordat/kənˈkɔː.dæt/

    A formal agreement, especially with a church.

    “They reached a concordat.”

  31. nonpartisan/ˌnɒnˈpɑː.tɪ.zən/

    Not supporting any political party.

    “She gave a nonpartisan view.”

  32. bilateral/baɪˈlæt.ər.əl/

    Involving two countries or groups.

    “They held bilateral talks.”

  33. multilateral/ˌmʌl.tiˈlæt.ər.əl/

    Involving many countries or groups.

    “It is a multilateral treaty.”

  34. intermediary/ˌɪn.təˈmiː.di.ər.i/

    A person who helps two sides communicate.

    “She acted as an intermediary.”

  35. interlocutor/ˌɪn.təˈlɒk.jə.tə/

    A person taking part in a discussion.

    “He is a trusted interlocutor.”

  36. impasse/ˈæm.pɑːs/

    A situation in which no progress is possible.

    “The talks reached an impasse.”

  37. deadlock/ˈded.lɒk/

    A situation where neither side will give way.

    “Negotiations ended in deadlock.”

  38. olive branch/ˌɒl.ɪv ˈbrɑːntʃ/

    An offer of peace or reconciliation.

    “He offered an olive branch.”

  39. partition/pɑːˈtɪʃ.ən/

    The dividing of a country into separate parts.

    “The partition split the country.”

  40. displacement/dɪsˈpleɪs.mənt/

    The forcing of people from their homes.

    “The war caused mass displacement.”

  41. deterrence/dɪˈter.əns/

    The prevention of war by the threat of force.

    “Nuclear deterrence kept the peace.”

  42. de-escalation/ˌdiː.es.kəˈleɪ.ʃən/

    The reducing of the intensity of a conflict.

    “They called for de-escalation.”

  43. aggression/əˈɡreʃ.ən/

    Hostile behaviour or an attack.

    “The world condemned the aggression.”

  44. incursion/ɪnˈkɜː.ʃən/

    A sudden invasion into another's territory.

    “An incursion crossed the border.”

  45. peacemaker/ˈpiːsˌmeɪ.kə/

    A person who tries to bring about peace.

    “She is a respected peacemaker.”

  46. accordance/əˈkɔː.dəns/

    Agreement with a rule or wish.

    “It was done in accordance with the law.”

  47. conciliation/kənˌsɪl.iˈeɪ.ʃən/

    The act of making peace between sides.

    “Conciliation ended the strike.”

  48. coalesce/ˌkəʊ.əˈles/

    To come together to form one group.

    “The factions began to coalesce.”

  49. flashpoint/ˈflæʃ.pɔɪnt/

    A place or moment where conflict may break out.

    “The border is a flashpoint.”

  50. warmonger/ˈwɔːˌmʌŋ.ɡə/

    A person who tries to start wars.

    “Critics branded him a warmonger.”

  51. pacify/ˈpæs.ɪ.faɪ/

    To bring peace or calm to a place.

    “Troops tried to pacify the region.”

  52. pacifist/ˈpæs.ɪ.fɪst/

    A person who believes war is always wrong.

    “She is a lifelong pacifist.”

  53. dovish/ˈdʌv.ɪʃ/

    Preferring peace and negotiation.

    “He took a dovish stance.”

  54. hawkish/ˈhɔː.kɪʃ/

    Favouring force and war over peace.

    “Her tone was distinctly hawkish.”

  55. ratification/ˌræt.ɪ.fɪˈkeɪ.ʃən/

    The official approval of an agreement.

    “The treaty awaits ratification.”

  56. entente/ɒnˈtɒnt/

    A friendly understanding between countries.

    “The two states formed an entente.”

  57. subversion/səbˈvɜː.ʃən/

    The secret undermining of a government.

    “They were charged with subversion.”

  58. concord/ˈkɒŋ.kɔːd/

    A state of agreement and peace.

    “The treaty restored concord.”

  59. onslaught/ˈɒn.slɔːt/

    A fierce and sudden attack.

    “They withstood the onslaught.”

  60. amity/ˈæm.ɪ.ti/

    Friendly relations between people or nations.

    “The visit fostered amity.”

Using conflict & diplomacy words in English

Diplomatic English is the most French vocabulary in the language, and several words on this page keep their accents and their pronunciation: détente, communiqué, attaché, rapprochement. The page also flags appeasement, which is not a neutral word in English and has not been since 1938 — a case where historical context has permanently coloured meaning.

What to watch out for

Words learners mix up

Diplomatic vocabulary is precise about three things ordinary English blurs: who is carrying the message, whether talks have merely stopped or genuinely improved, and what category a fighter or an act falls into.

Who is carrying the message?

WordWhat it actually meansIn a sentence
envoyAn official representative sent on a specific mission. The most general term, and often a named appointment.The UN appointed a special envoy to the region.
emissarySomeone sent with a message, often discreetly. Slightly literary, and it suggests a private or delicate errand.He arrived as a personal emissary of the president.
attachéA specialist member of embassy staff — military, cultural, commercial. A permanent post, not a mission.The defence attaché attended the briefing.
intermediaryA neutral third party carrying proposals between two sides who are not meeting.Oman acted as an intermediary for two years.
interlocutorThe person you are actually talking to. Formal, and it names a role in a conversation rather than a job.His interlocutors refused to confirm the offer.

Only intermediary requires neutrality — an envoy and an emissary both represent one side. Interlocutor is the one learners overreach with: it means simply the other party in a discussion, so it carries no diplomatic rank at all.

Stuck, or actually getting better?

WordWhat it actually meansIn a sentence
impasseA position from which no progress is possible. French, and stressed on the first syllable in British English.Talks reached an impasse over borders.
deadlockThe same situation in plainer English, and it is what negotiators are said to break.The deadlock lasted eleven weeks.
flashpointNot a stall at all — a place or issue where conflict could ignite at any moment.The border town remains a flashpoint.
de-escalationDeliberately reducing the intensity of a confrontation. Hyphenated, and it describes steps taken, not an outcome reached.Both sides signalled de-escalation.
conciliationActively working to end a dispute and restore goodwill. Warmer than de-escalation, and it aims at agreement.A gesture of conciliation after the vote.

The pairing to keep apart is impasse and flashpoint: one means nothing is moving, the other that something might explode. And de-escalation only claims things became less dangerous — not that anything was settled, which is exactly why officials prefer it.

Fighters and acts: the categories are legal, not descriptive

WordWhat it actually meansIn a sentence
belligerentA state or party formally engaged in a war — a status in international law. Also an adjective meaning aggressive.Both belligerents accepted the terms.
insurgentSomeone fighting an established government from within. Whether it reads as pejorative depends entirely on the writer.Insurgent groups controlled three provinces.
guerrillaA fighter using irregular tactics against a larger force. Describes the method, not the cause. Note the double r and double l.A long guerrilla campaign in the hills.
mercenaryA fighter serving for payment rather than allegiance. Also an adjective meaning motivated purely by money.Foreign mercenaries were reported on both sides.
atrocityAn act of extreme cruelty in war. A moral judgement in ordinary use and increasingly a legal one.Investigators documented several atrocities.

Genocide deserves particular care: it has a specific definition in the 1948 Convention requiring intent to destroy a national, ethnic, racial or religious group. Reporting therefore says alleged genocide or attributes the term until a court has ruled, and an essay should do the same.

Collocations that sound natural

Almost every noun here takes one verb and refuses the others. Diplomatic reporting is formulaic by design, because the formula signals exactly how much has been committed to.

See the full C1 collocations list →

Formal, neutral or informal?

Much of this vocabulary is loaded: several words are used only by one side of an argument, and two carry historical weight a learner may not hear.

Sentences to try

Four frames from diplomatic reporting. Watch the accents and the loaded word.

Questions about conflict & diplomacy vocabulary

Why is "appeasement" a negative word in English?

Because of the 1930s. The word originally meant simply pacifying or making concessions to keep the peace, but its association with British policy towards Nazi Germany, and above all with the Munich Agreement of 1938, made it permanently pejorative in English. Since then, calling any policy appeasement accuses it of cowardice and of encouraging further aggression. If you want to describe concessions neutrally, the available words are conciliation, accommodation, compromise or a negotiated settlement.

Should I keep the accents on words like "détente" and "communiqué"?

In formal writing, yes. British English retains the accents on recent French borrowings where they affect pronunciation: détente, communiqué, attaché, exposé, résumé, café. Dropping them is increasingly common in journalism and in informal writing, and some, like cafe, are now fully acceptable without. In diplomatic and academic prose the accented forms remain standard, and omitting the acute on communiqué in particular still reads as an error rather than a variant.

What is the difference between an accord, a treaty and a pact?

A treaty is the most formal: a binding agreement under international law, usually requiring ratification by the states involved. An accord is an agreement reached between parties, often used for the political settlement that precedes or accompanies a treaty, and it need not carry the same legal weight. A pact is a less technical word for an agreement, often between two parties and frequently used of alliances. Protocol and convention are further terms, both denoting particular kinds of formal international instrument.

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