Don’t like to be fussy but it is pronounced row (as in argument).
To get to Roughtor drive to Camelford and head SE, a single track road takes you out to a car park(look out for the big dipper !!) and from ther it is a good walk up to the tor. On your way you will pass many hut circles, head for the left end of the tor as it is easier to ascend the top from there.
Don’t miss the Charlotte Drymond memorial stone to the right of the ford just below the carpark. A modern day menhir.