renegotiate
verb[IorT]
uk/ˌriːnəˈɡəʊʃieɪt/ustodiscussanagreementagain inordertochangeit:
Thebankdid notwanttorenegotiate thetermsoftheloan.
renegotiation
noun[CorU]
He will be in apowerfulpositionregardinga renegotiation of hiscontract, whichexpiresinJune.