ret·ro·gress 
(rĕtrə-grĕs′, rĕt′rə-grĕs)
(rĕtrə-grĕs′, rĕt′rə-grĕs)intr.v. ret·ro·gressed, ret·ro·gress·ing, ret·ro·gress·es
1. To return to an earlier, inferior, or less complex condition.
2. To go or move backward.
[Latin retrōgradī, *retrōgress- : retrō-, retro- + gradī, to go; see ghredh- in the Appendix of Indo-European roots.]
ret′ro·gression (-grĕshən) adj.
ret′ro·gressive adj.
re′tro·gressive·ly adv.
- unconstitutional
- unconstitutionality
- unconstitutionally
- unconstructed
- uncontaminated
- uncontested
- uncontrollability
- uncontrollable
- uncontrollableness
- uncontrollably
- uncontrolled
- uncontrolledness
- uncontroversial
- uncontroversially
- unconventional
- unconventionality
- unconventionally
- unconvincing
- unconvincingly
- uncooked
- uncool
- uncooperative
- uncooperatively
- uncooperativeness
- uncoordinated