“酝酿”的英文是？

brew
brew

vt., vi.
酿造（啤酒）
冲（茶或咖啡）
酝酿；孕育
A storm was brewing.
暴风雨即将来临。
As you brew, so you must drink.(谚)
自作自受。;自食其果。

gestation
n.
怀孕
怀孕期 (= gestation period)
（思想、计划等的）酝酿时期

不同的语境之下会有不同的用法，我不知道你要用的具体语境是什么，提供一些例句，自己去选最适合你想要的表达方式吧。

1.Is Ed still with Technicolor? Did he ever get started on that history of the movies he was going to write?
埃德现仍在研究彩色印刷术吗？他没有开始写他酝酿已久的电影发展史？

2.There are many events in the womb of time.
有许多事件正在酝酿之中。

3.A war seems to be brewing between the two countries
两国间似乎正在酝酿战争

4.The members of the committee are ruminating over a plan.
委员会委员们在反复酝酿一项计划。

5.We'll kick some ideas around and make a decision tomorrow.
我们先酝酿一下，明天再作决定。

6.Just look at that sky, it's working up for a storm.
瞧瞧那边天上，正在酝酿一场暴雨。

7.give us a hint of the excitement that was in store for us
给了我们