weapon
/ˈwepən; `wɛpən/ n
1 thing designed or used for causing physical harm (eg a bomb, gun, knife, sword, etc) 武器, 兵器（如炸弹、 枪、 炮、 刀、 剑等）
They were carrying weapons. 他们携带著武器.
armed with weapons用武器武装的
a deadly weapon 致命的武器.
2 action or procedure used to defend oneself or get the better of sb in a struggle or contest （在斗争中或竞争中）自卫的或克敌制胜的行动或手段
Their ultimate weapon was the threat of an all-out strike. 他们最後的杀手 是威胁举行大罢工.
Humour was his only weapon against their hostility. 他有幽默感, 这是他对付他们的敌对行动的唯一手段.