Dreary routine is a phrase that describes a tedious and monotonous job. The crossword solutions for this term are GRIND (5 letters), RUT (3 letters), and TREADMILL (9 letters). GRIND is a verb meaning to reduce something to small particles or powder by crushing it. RUT is a noun meaning a habit or pattern of behavior that has become dull and unproductive. TREADMILL is a noun meaning a device with an endless belt on which a person can walk or run in place.