Unuseful

in regard of the situation of this strong Fortresse, they did neither feare them nor hurt them, being upon the point of a faire promontory, environed on the one side within halfe a mile with an un-usefull mountaine, and on the other side with a faire Plaine […]

If it is deemed to be unuseful, attempt to terminate the action or reverse the impact as much as possible. If it is a useful action compliment yourself and smile inwardly.