fallow

fallow land/fields休耕地/田

allowing several fields to lie fallow让几块大田处于休耕状态

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

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。