unprepared 

英汉解释

adj. 无准备的；即席的；尚未准备好的

反义词

a.   prepared

参考例句

1. To go on a journey unprepared can lead to disastrous results.
要继续无准备的旅途可能导致惨败的结果。
2. Students from tropical countries are often unprepared for the British climate.
热带国家的学生往往对英国的气候毫无准备。
3. But, much more importantly, it precludes anyone who is unprepared to step out of their job and their career path from pursuing an MBA.
但更重要的是，任何不打算辞去工作和中断职业发展道路的人，都被挡在了攻读MBA的大门之外。

英英解释

adj.
  1. without preparation; not prepared for

网络释义

unprepared
即席的; 还没有准备好的; 不备; 无准备的;
unprepared scrap
未选废金属;
unprepared question
应变能力;
unaware unprepared
措手不及;
unprepared airfield
无铺面机场;