The term 'set back' can be defined as a hindrance or obstacle that causes a DELAY or reversal in progress. The crossword solutions for this term include DETAIN (6 letters), INDENTED (8 letters), IMPEDE (6 letters), DELAY (5 letters), REVERSE (7 letters), SLOW (4 letters), MIRE (4 letters), RETARD (6 letters), COST (4 letters), HANGUP (6 letters), RECESS (6 letters), and SCENERY (7 letters). Each of these words can be used to describe a situation in which progress is hindered, delayed, or reversed. For example, DETAIN means to keep someone from proceeding, IMPEDE means to obstruct progress, DELAY means to cause a postponement, REVERSE means to turn around, SLOW means to reduce speed, MIRE means to entangle, RETARD means to SLOW down, COST means to require payment, HANGUP means to cause a problem, RECESS means to take a break, and SCENERY means to view something. All of these words can be used to describe a situation in which progress is hindered, delayed, or reversed.