Sentence:  What had <WSD>been</WSD> an unmanageably powerful introject was now , despite its continuing charge of energy disconcerting to me , sufficiently within control of her ego that she could use it to show me what this introjected mother was like . 
Meaning of the word marked with <WSD> tags:  have the quality of being; (copula, used with an adjective or a predicate noun)