rep·ar·tee 
(rĕp′ər-tē, -tā, -är-)
(rĕp′ər-tē, -tā, -är-)n.
1. A swift, witty reply.
2. Conversation marked by the exchange of witty retorts.
[French repartie, from feminine past participle of repartir, to retort, from Old French, to retort, to depart again : re-, re- + partir, to depart (from Latin partīre, to divide, from pars, part-, part; see perə-2 in the Appendix of Indo-European roots).]