redshirt
v.β Β«After the morning announcements and the Pledge of Allegiance, Andersenβs kindergartners sat down on a blue rug. Two, one boy and one girl, had been redshirtedβthe term, borrowed from sports, describes students held out for a year by their parents so that they will be older, or larger, or more mature, and thus better prepared to handle the increased pressures of kindergarten today.Β» ββWhen Should a Kid Start Kindergarten?” by Elizabeth Weil New York Times June 3, 2007. (source: Double-Tongued Dictionary)