Sentence:  `` We must persuade them to enjoy a way of life which , if not identical , <WSD>is</WSD> congenial with ours '' , he said but adding that if they do not develop the kind of society they themselves want it will lack ritiuality and loyalty . 
Meaning of the word marked with <WSD> tags:  have the quality of being; (copula, used with an adjective or a predicate noun)