to lock up, to coop up
to lock away, put away, to imprison, to nail (in a prison or mental hospital)
to enclose, to confine, to immure
to contain, to hold, to include, to encapsulate, to entail
(games) to stalemate
(typography) to separate (between brackets, commas)
(reflexive) to take over; occupy (a building)
(reflexive) to shut oneself up, to withdraw, to shut away oneself, to shut off oneself, to lock up or lock down oneself, to close off oneself
(reflexive) to shy away