Sentence:  The motifs of impersonal <WSD>interdependence</WSD> and insulation of residential communities have polarized ; the schism between central city and suburb , Negro and White , blue collar and white collar can be viewed as symptomatic of this deeper polarization of trends in the metropolis . 
Meaning of the word marked with <WSD> tags:  a reciprocal relation between interdependent entities (objects or individuals or groups)