sequester

 
Pronunciation: /sɪˈkwɛstə/

verb

[with object]
  • 1isolate or hide away: she is sequestered in deepest Dorset the artist sequestered himself in his studio for two years
  • 2another term for sequestrate. their property was sequestered by Parliament
  • 3 Chemistry form a chelate or other stable compound with (an ion, atom, or molecule) so that it is no longer available for reactions: non-precipitating water softeners use complex phosphates to sequester calcium and magnesium ions (as adjective sequestering) the organic sequestering agent EDTA

Origin:

late Middle English: from Old French sequestrer or late Latin sequestrare 'commit for safekeeping', from Latin sequester 'trustee'