“防御的”用英语怎么说

匪徒袭击无防御的村庄.The bandits descended upon the defenseless village.匪徒突袭无防御的村庄.The bandits descended on the defenseless village.他一下子就采取防御的态度,可是想不出用什么话来回答.He was on the defensive at a wink and puzzled for a word to reply....