Sentence:  By making inroads in the name of law enforcement into the protection which Congress has afforded to the <WSD>marriage</WSD> 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 state of being a married couple voluntarily joined for life (or until divorce)