ret·ro·cede 
(rĕt′rō-sēd)
(rĕt′rō-sēd)v. ret·ro·ced·ed, ret·ro·ced·ing, ret·ro·cedes
v.intr.
To go back; recede.
v.tr.
To cede or give back (a territory, for example); return.
[Latin retrōcēdere : retrō-, retro- + cēdere, to go; see ked- in the Appendix of Indo-European roots.]
ret′ro·cession (-sĕshən) n.