Sentence:  What had been an unmanageably powerful introject was now , despite its continuing charge of energy disconcerting to me , sufficiently within control of her ego that she could <WSD>use</WSD> it to show me what this introjected mother was like . 
Meaning of the word marked with <WSD> tags:  put into service; make work or employ for a particular purpose or for its inherent or natural purpose