Sentence:  By making inroads in the name of law enforcement into the <WSD>protection</WSD> which Congress has afforded to the marriage relationship , the Court today continues in the path charted by the recent decision in Wyatt v. United States , 362 U. S. 525 , where the Court held that , under the circumstances of that case , a wife could be compelled to testify against her husband over her objection . 
Meaning of the word marked with <WSD> tags:  the activity of protecting someone or something