Where does the word 'rock' come from?

@kialele (126)
United States
March 1, 2010 12:37pm CST
In english (probably American english?), people like to say 'It rocks'. I wonder how and where does this word 'rock' from and why people use this work in this situation?
1 response
@besthope44 (12146)
• India
4 Apr 10
I feel rocking is breaking through. So just like rocking, we can break through the tough times or tough jobs.