Sentence:  On the positive side , recent Federal action has largely undermined the legal sanction so long enjoyed by the segregationist position ; anti-discriminatory statutes in housing have now been adopted by thirteen states and , while specific provisions have <WSD>varied</WSD> , the tendency is clearly toward expanding coverage . 
Meaning of the word marked with <WSD> tags:  become different in some particular way, without permanently losing one's or its former characteristics or essence