to shut up (e.g. an animal) in a pound; to confine (somebody or something) as if in a pound
to take legal possession of (something, e.g. evidence from a crime scene, an illegally parked vehicle, etc)
to collect and confine (water) in a dam or as if in a reservoir
impoundable adj
impoundage /-dij/ noun
impounder noun
impoundment noun