impound in WordNet English dictionary

1. take temporary possession of as a security, by legal authority
   "The FBI seized the drugs"; "The customs agents impounded the illegal shipment"; "The police confiscated the stolen artwork"
   impound  attach  sequester  confiscate  seize 
   
2. place or shut up in a pound
   "pound the cows so they don't stray"
   impound  pound