defective virus one that cannot be completely replicated or cannot form a protein coat; in some cases replication can proceed if missing gene functions are supplied by other viruses; see also helper virus.
subjugate - put down by force or intimidation; The government quashes any attempt of an uprising; China keeps down her dissidents very efficiently; The rich landowners subjugated the peasants working the land
In simple terms, subrogation means substitution of one person for another. Subrogation permits a landlord's insurer, in the event of a casualty negligently caused by one of its tenants, to step into the shoes of landlord and make a claim against such tenant.