KEY: Invade.
SYN: Attack, assault, encroach, occupy, assail, violate, encroach upon, intrude upon, infringe upon, trench upon.
ANT: Vacate, abandon, evacuate, relinquish.
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KEY: Invalid.
SYN: infirm, sick, weakly, frail, feeble.
ANT: Strong, vigorous, healthy, well.
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KEY: Invalidate.
SYN: Annul, overthrow, [See ANNUL].