To relieve the tedium they messed about with a tennis ball.
Tedium is the state of being tedious.An example of tedium used in a sentence is: "cousins and uncles filled the tedium of winter nights with many a tall tale"
Reading a good book will relieve the tedium of the lengthy flight to Africa.
The tedium of English class caused me to fall asleep in the back of the class.
Tedium avoidance is what you need to do to avoid boredom because if you get bored in training you can get demotivated which will decrease your fitness level. Make sure you vary you activities to avoid tedium in sport
Let's relieve the tedium of this long journey by getting some hot chocolate and chatting.
Tedium, as in boring.