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
Subordinating conjunctions are one type of conjunction, which join clauses to clauses. (Remember that a clause is a group of words containing a subject and a verb.) The word subordinating means that the conjunction subordinates one clause to another. Think sub as in under: a clause introduced by a subordinating conjunction is on a lower order of importance in the sentence.