weapon
noun /ˈwepən/
  /ˈwepən/
Idioms - an object such as a knife, gun, bomb, etc. that is used for fighting or attacking somebody
- Modern nuclear weapons are much more destructive than either biological or chemical weapons.
 - a lethal/deadly weapon
 - The police still haven't found the murder weapon.
 - Police believed the men were carrying weapons.
 - She was convicted of possessing an offensive weapon.
 - Two officers fired their weapons.
 - with a weapon A lone gunman opened fire with an automatic weapon.
 
Wordfinder- army
 - artillery
 - battalion
 - command
 - defend
 - invade
 - officer
 - regiment
 - tactics
 - weapon
 
Collocations War and peaceWar and peaceStarting a warsee also biological weapon, chemical weapon- declare/make/wage war (on somebody/something)
 - go to war (against/with somebody)
 - cause/spark/provoke/foment/quell unrest
 - incite/lead/crush/suppress a revolt/rebellion
 - launch/mount/carry out a surprise/terrorist attack
 - prevent/halt/represent an escalation of the conflict
 - be torn apart by/be on the brink of civil war
 - enter/invade/occupy somebody’s territory
 - lead/launch/resist/repel an invasion
 
- adopt/develop/implement/pursue a military strategy
 - carry out/execute/perform military operations/manoeuvres
 - send/deploy/station/pull back/withdraw troops
 - go on/fly/carry out a reconnaissance/rescue mission
 - train/equip/deploy army/military/combat units
 - lead/launch/conduct a raid/a surprise attack/an (air/airborne/amphibious) assault (on somebody)
 - employ/use guerrilla tactics
 - conduct/wage biological/guerrilla warfare
 - fight/crush/defeat the rebels/the insurgency
 - suffer/inflict a crushing defeat
 - achieve/win a decisive victory
 - halt/stop the British/German/Russian advance
 - order/force a retreat
 
- join/serve in the army/navy/air force
 - be/go/remain/serve on active duty
 - serve/complete/return from a tour of duty
 - be sent to the front (line)
 - attack/strike/engage/defeat/kill/destroy the enemy
 - see/report/be engaged in heavy fighting
 - call for/be met with armed resistance
 - come under heavy/machine-gun/mortar fire
 - fire a machine-gun/mortar shells/rockets (at somebody/something)
 - shoot a rifle/a pistol/bullets/missiles
 - launch/fire a cruise/ballistic/anti-tank missile
 - use biological/chemical/nuclear weapons
 - inflict/suffer/sustain heavy losses/casualties
 - be hit/killed by enemy/friendly/artillery fire
 - become/be held as a prisoner of war
 
- harm/kill/target/protect innocent/unarmed civilians
 - cause/avoid/limit/minimize civilian casualties/collateral damage
 - impose/enforce/lift a curfew
 - engage in/be a victim of ethnic cleansing
 - be sent to an internment/a concentration camp
 - accept/house/resettle refugees fleeing from war
 - fear/threaten military/violent reprisals
 - commit/be accused of war crimes/crimes against humanity/genocide
 
- make/bring/win/achieve/maintain/promote peace
 - call for/negotiate/broker/declare a ceasefire/a temporary truce
 - sign a ceasefire agreement
 - call for/bring/put an end to hostilities
 - demand/negotiate/accept the surrender of somebody/something
 - establish/send (in) a peacekeeping force
 - negotiate/conclude/ratify/sign/accept/reject/break/violate a peace treaty
 
Extra ExamplesTopics War and conflictb1, Crime and punishmentb1- ‘Load your weapons!’ Barrett ordered.
 - A massive weapons cache was uncovered.
 - Drop your weapons, or he dies!
 - He was charged with assault with a deadly weapon.
 - She pleaded guilty to carrying an offensive weapon.
 - The armed men lowered their weapons and stepped aside.
 - The assault forces used heavy weapons, including anti-tank rockets and mortars.
 - The guards began to draw their weapons.
 - a ban on the use of tactical nuclear weapons
 - arrested for carrying a concealed weapon
 - nuclear weapons proliferation
 - states that have acquired nuclear weapons
 - the illegal transfer of weapons technology to hostile countries
 - 14 people were killed when men armed with automatic weapons opened fire on the crowd.
 - Almost any bladed or sharply pointed article is potentially a lethal weapon.
 
Oxford Collocations Dictionaryadjective- deadly
 - lethal
 - potent
 - …
 
- be armed with
 - carry
 - have
 - …
 
- system
 - technology
 - cache
 - …
 
- weapon against
 
 - something such as knowledge, words, actions, etc. that can be used to attack or fight against somebody/something
- Education is the only weapon to fight the spread of the disease.
 - Guilt is the secret weapon for the control of children.
 
Extra Examples- She used humour and wit as weapons against her enemies.
 - The team's secret weapon was their new young defender.
 - The workers' ultimate weapon was the strike.
 - This relaxation technique can serve as an effective weapon against stress.
 
Oxford Collocations Dictionaryadjective- deadly
 - lethal
 - potent
 - …
 
- be armed with
 - carry
 - have
 - …
 
- system
 - technology
 - cache
 - …
 
- weapon against
 
 
Word OriginOld English wǣp(e)n, of Germanic origin; related to Dutch wapen and German Waffe.
Idioms 
be a double-edged/two-edged sword/weapon 
- to be something that has both advantages and disadvantages
- Fame is a double-edged sword.