unwary

形容词 unwary:

1. not alert to danger or deception- O.J.Campbell

1. Suddenly we hear the shriek of unwary animal take by surprise.
   突然我们听到了无戒备的动物遭突袭的尖叫声。
2. Exploitation of unwary consumers.
   对粗心消费者的不当利用
3. A stratagem for catching or tricking an unwary person.
   圈套迷住或欺骗一个不警觉的人的计谋