trans·act 
(trăn-săkt, -zăkt)
(trăn-săkt, -zăkt)v. trans·act·ed, trans·act·ing, trans·acts
v.tr.
To do, carry on, or conduct: transact business over the phone; transacting trade agreements.
v.intr.
To conduct business: transacting with foreign leaders.
[Latin trānsigere, trānsāct- : trāns-, trans- + agere, to drive, do; see ag- in the Appendix of Indo-European roots.]
trans·actor n.