warfare
n[U]
(a) (fighting a) war (作)战; 战争
guerrilla, modern, nuclear warfare 游击战、 现代战争、 核战.
(b) (esp violent) conflict or struggle (尤指激烈的)冲突, 斗争
There is open warfare between the opponents of the plan and its supporters. 支持与反对这一计画的双方已公开论战. warfare => war.