Modifies a noun

• schedule: We had a rather grueling schedule with Nate, between medications, his special feedings, and just the routine care for him.

• test: Will they succumb to it or will their bond survive the grueling test of time?

• hour: Whoever put all the grueling hours into this did one hell of a job!

• event: Each driver will modify his daily regimen to better prepare for a grueling 24-hour endurance event.

• process: For those who were brought up with the existing law, however, there is a grueling upgrading process ahead.

• day: We so look forward to coming home after grueling day 's employment in the land of the free and home of the brave ( ?