hole up

Etymology
From. Attested from the 19th century.

Verb

 * 1)  To go into a hole, to shelter in a hole.
 * 2)  To hide.
 * The guerrillas holed up in a small cave.
 * 1) * 2005, BBC News, Thursday, 27 January, 2005, 18:50 GMT:
 * The battle ended a two-day siege of an apartment block, where the suspects were holed up.
 * The battle ended a two-day siege of an apartment block, where the suspects were holed up.