impound, attach, sequester, confiscate, seize (verb)

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, pound (verb)

place or shut up in a pound

"pound the cows so they don't stray"

impound (Verb)

To shut up or place in an inclosure called a pound;

impound (Verb)

To hold in the custody of a court or its delegate; as, to impound stray cattle; to impound a document for safe keeping.