IMPOUNDED

Verb

impounded

simple past tense and past participle of impound

Source: Wiktionary

IMPOUND

Im*pound" (, v. t. [imp. & p. p. Impounded; p. pr. & vb. n. Impounding.]

Definition: To shut up or place in an inclosure called a pound; hence, to hold in the custody of a court; as, to impound stray cattle; to impound a document for safe keeping. But taken and impounded as a stray, The king of Scots. Shak.

Source: Webster’s Unabridged Dictionary 1913 Edition