fallow /ˈfæloʊ/ adjective Learner's definition of FALLOW
1
: not used for growing crops : not planted（土地）休耕的，休闲的 2
: not active or productive不活跃的；不生产的 -
a writer who has been going through a fallow period [=a period in which he has done no writing]已经辍笔一段时间的作家
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There were too many promising ideas lying fallow [=not being used] at the company.公司有太多好点子没有被派上用场。