Sentence:  What had been an unmanageably powerful introject was now , despite its continuing charge of <WSD>energy</WSD> 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:  (physics) a thermodynamic quantity equivalent to the capacity of a physical system to do work; the units of energy are joules or ergs