Etymology
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impound (v.)
early 15c., "to shut up in a pen or pound," from assimilated form of in- "into, in" (from PIE root *en "in") + pound (n.). Originally of cattle seized by law. Related: Impounded; impounding.
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impoundment (n.)
1660s; see impound + -ment. Earlier in the same sense were impoundage (1610s), impounding (1550s).
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