#1 impound v. [attach, sequester, confiscate, seize] 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". wn
#2 impound v. [pound] place or shut up in a pound; "pound the cows so they don't stray". wn
vizzz