unplanned 

英汉解释

adj. 意外的；在计划外的；未经筹划的

同义词

a. unintentional，unwitting

反义词

a.   planned

参考例句

1. Complications are unplanned events linked to the operation.
并发症是手术难以预料的情况。
2. TOM - TOM is a compiled object-oriented programming language that advocates unplanned reuse of code.
TOM是一个可编译的、面向对象的编程语言，支持代码的无计划的重用。
3. After all, the last thing you want is to have an unplanned pregnancy or to catch a disease from your partner.
毕竟，你最不希望发生的事情便是意外妊娠或是因你的性伴侣而染上某种疾病。

英英解释

adj.
  1. without apparent forethought or prompting or planning
  2. not intentional

网络释义

unplanned
无计划的;
unplanned market
非计划市场;
unplanned ECCE
非计划性的白内障囊外摘出术;
unplanned extubation
自行拔管;
Unplanned outrage
非计划停运;