Convert (assets) into fixed capital. Synonym:immobilize.
5.
Prohibit the conversion or use of (assets). Synonyms:block, freeze, immobilize."Freeze the assets of this hostile government"Antonyms:unblock, unfreeze.
... Russia should, as quickly as possible, get within striking distance of our Indian possessions, so that she may always be able to bring strong diplomatic pressure on the British Government, and in the event of a conflict immobilise a large part of ... — Russia • Donald Mackenzie Wallace