英汉解释

adj. 适当的；恰好的；合时宜的

反义词

a.   inopportune

参考例句

1. The place was not very opportune for her grief.
那地方是不大适合她伤心流泪的。
2. Make your plan—then wait for the opportune moment to submit it.
制定好你的计划，然后等待付诸实现的机会到来。
3. The opportune arrival of the bus cut short the boring conversation.
公车的适时到来缩短了这场无聊的谈话。

英英解释

adj.
  1. suitable or at a time that is suitable or advantageous especially for a particular purpose

网络释义

opportune
合时宜的; 恰好的; 合适的; 适合的，时机恰当的;
opportune moment
恰当时机;
opportune confabulation
适机虚谈症;
seize the opportune moment
（抓住机会）不失时机; 抓住机会; 不失时机;
opportune moment for interrogation
审讯时态; 审讯时机;