ne·go·ti·ate 
(nĭ-gōshē-āt′)
(nĭ-gōshē-āt′)v. ne·go·ti·at·ed, ne·go·ti·at·ing, ne·go·ti·ates
v.intr.
To confer with another or others in order to come to terms or reach an agreement: "It is difficult to negotiate where neither will trust" (Samuel Johnson).
v.tr.
1. To arrange or settle by discussion and mutual agreement: negotiate a contract.
2. To transfer (an instrument, such as a promissory note) to another party by means of endorsement.
3.
a. To succeed in going over or through: negotiate a sharp curve.
b. To succeed in accomplishing or managing: negotiate a difficult musical passage.
[Latin negōtiārī, negōtiāt-, to transact business, from negōtium, business : neg-, not; see ne in the Appendix of Indo-European roots + ōtium, leisure.]
ne·goti·a′tor n.
ne·gotia·to′ry (-shə-tôr′ē, -shē-ə-) adj.