defoliate

1. V-T To defoliate an area or the plants in it means to cause the leaves on the plants to fall off or be destroyed. This is done especially in war to remove protection from an enemy. 脱叶

...Agent Orange, the infamous, dioxin-laced cocktail used to defoliate the Vietnamese jungle. ...橙剂，掺有二恶英的劣质鸡尾酒用于使越南丛林树木落叶。

2. defoliationN-UNCOUNT

...preventing defoliation of trees by caterpillars. ...预防因毛毛虫造成的树木脱叶。