preparatory school (for entrance examinations); cram school; cramming school
background knowledge; prerequisite knowledge
reserves (esp. troops); reserve army; potential members of some group (e.g. the elderly); people at risk (e.g. of a medical condition); wannabees
service in the first reserve
preliminary election; primary (election)
reserve funds; emergency funds
preliminary investigation
spade work; preliminaries
reserve equipment; backup unit; spare
pilot study; preliminary study
crime of plotting a crime; crime of preparing to commit an offense; preparation of a crime
reserve fund; emergency fund
voir dire (hearing to determine the admissibility of evidence, or the competency of a witness or juror)
reserve officers' cadet school
court of inquiry; court of enquiry
(crime of) preparations or plots for private war