Sentence:  Cambodia 's chief of state , who has been accused of harboring Communist marauders and otherwise making life miserable for neighboring South Viet Nam and Thailand , insists he would <WSD>be</WSD> very unhappy if communism established its power in Southeast Asia . 
Meaning of the word marked with <WSD> tags:  have the quality of being; (copula, used with an adjective or a predicate noun)