Verb
keep under (third-person singular simple present keeps under, present participle keeping under, simple past and past participle kept under)
(transitive) To hold in subjection; hence, to oppress.
Despite more than £9 million sent to help the Island, Robert Jenrick, secretary of state for housing, communities and local government minister, has said he will keep under review whether more money is required and if it is, they will bring it forward. Source: Internet
But, there are a few things you should never keep under your bed. Source: Internet