Setback /(sĕt"băk`)/

Set·back

Setback

n.
  1. Offset, n., 4. (Arch.)
  2. A backset; a countercurrent; an eddy. [U. S.]
  3. A reversal of progress in an endeavor; a reverse; a backset; a check; a repulse; a relapse. [Colloq. U.S.]