Merriam-Webster Collegiate Dictionary - sequester

 I. transitive verb  (-tered; ~ing)  Etymology: Middle English sequestren, from Anglo-French sequestrer, from Latin sequestrare to hand over to a trustee, from ~ third party to whom disputed property is entrusted, agent, from secus beside, otherwise; akin to Latin sequi to follow  Date: 14th century  1.  a. to set apart ; segregate ~ a jury  b. seclude, withdraw widely spaced homes are forbiddingly grand and ~ed — Don Asher  2.  a. to seize especially by a writ of sequestration  b. to place (property) in custody especially in sequestration  3. to hold (as a metallic ion) in solution usually by inclusion in an appropriate coordination complex  II. noun  Date: 1604 obsolete separation, isolation