fraternize
fraternise, v [I, Ipr]
~ (with sb) become friendly with enemy soldiers, or with civilians of a former enemy country (与敌军士兵、 原敌国百姓)建立友谊
Soldiers who fraternize with the enemy will be punished. 亲敌的士兵将受到惩罚.
Army personnel are often forbidden to fraternize with the civilian population. 军职人员常被禁止与平民百姓友好往来.