兵器（へいき、heiki）
- weapon

The Japanese word 兵器 (へいき, *heiki*) translates to "weapon" or "arms" in English. It refers to any instrument or device designed and used for combat or warfare. This includes a wide range of items, from simple tools like swords and arrows to complex systems like tanks, missiles, and nuclear weapons. The primary function of 兵器 is to inflict harm, damage, or destruction upon an enemy or target.

⚫︎最新の兵器 Translation: The latest weapons. ⚫︎兵器の開発 Translation: The development of weapons. ⚫︎大量破壊兵器 Translation: Weapons of mass destruction.

兵器 is used in formal and informal contexts when discussing weapons, military equipment, or warfare. It is common in news reports, historical accounts, scientific discussions, and even in fictional contexts like video games or anime. You can use it when talking about different types of weapons, the history of weapons, or the impact of weapons on society.

兵器 is primarily written in kanji. The hiragana reading is へいき (heiki). There are no variations in the okurigana. It is rarely written in katakana.

⚫︎ 武器 (*buki*): "Weapon," a more general term. ⚫︎ 兵装 (*heisou*): "Armament," often referring to the equipping of a military force. ⚫︎ 武器類 (*bukirui*): "Weapons and the like," plural form of weapon.

There are no direct antonyms for 兵器 as it describes a type of tool. However, related concepts could be: ⚫︎ 平和 (*heiwa*): "Peace." ⚫︎ 防衛 (*bouei*): "Defense."

その国は新しい兵器を開発した。 ・Translation: That country developed new weapons. ・Explanation: This sentence describes the development of new weaponry by a nation.

兵器の輸出は国際的な問題を引き起こすことがある。 ・Translation: The export of weapons can cause international problems. ・Explanation: This sentence discusses the potential negative consequences of weapons trade.

The word 兵器 is composed of two kanji: 兵 (*hei*) and 器 (*ki*). 兵 means "soldier," "troops," or "military." 器 means "tool," "vessel," or "instrument." Together, 兵器 indicates "military tools" or "weapons."