Mistreatment of someone by another person/group
6.62074139421 should be exact (calculator).
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Because it's a important part of the speech <span />
"Music is certainly an important part of The Tempest," says Professor Lindley. "It is an important means by which Prospero exercises his power, and it moves the characters round the stage. It puts the characters to sleep, it wakes them, it cures them of their madness, it propels the action."