S: (v) renegociate, renegotiate (revise the terms of in order to limit or regain excess profits gained by the contractor) "We renegociated our old mortgage now that the interest rates have come down"
S: (v) roll over (negociate to repay a loan at a later date for an additional fee) "roll over a loan"
S: (v) dicker, bargain (negotiate the terms of an exchange) "We bargained for a beautiful rug in the bazaar"