effectualness

He appears to have been unlucky, but to have helped his own bad luck with the only signs of effectualness that he ever showed.

She, and all who knew him well, had seen Stonor crush the cocksure and the unwary with an awful effectualness.

For the strong hold that iniquity shall have of their affections will cause that but little effectualness to this end will be found to attend the preaching of the Word unto them.