Jisho

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Noun
1. weapon; arms; ordnance
2. weapon (something used to gain an advantage); asset
Wikipedia definition
3. WeaponA weapon, arm, or armament is a tool or instrument used in order to inflict damage or harm to living beings - physical or mental -, artificial structures, or systems. In human society, weapons are used to increase the efficacy and efficiency of activities such as hunting, crime, law enforcement, and warfare. Weapons are employed individually or collectively. A weapon can be either expressly designed as such or be an item re-purposed through use (for example, hitting someone with a hammer).
Read “Weapon” on English Wikipedia
Read “武器” on Japanese Wikipedia
Read “Weapon” on DBpedia

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