Meanings of efficaciousness in English

I believe there was mention of testing the efficaciousness of kneeling, beards, and tongues.

A single one of its thrusts must equal and often surpass in efficaciousness the repeated wounds of the other.

In all directions our habitual causes of action seem to be losing efficaciousness, credit, and control, both with others and even with ourselves.

Although, after having to mediate a head-to-head between Boots and Biffy over the efficaciousness of velvet decorative pillows, she suspected generals had it easier.

According to this system, therefore, the efficaciousness of Grace comes from the Grace itself, and is not dependent upon the co-operation of the human will.

"The evidence supporting the efficaciousness of sunflower use in aetherosphere transit is sketchy at best."

"The purity of the spirit," says Van Helmont, "is shown through energy and efficaciousness of will.

"Could we send him one more message to be certain as to the efficaciousness of the transmitting room?" Lady Maccon asked hopefully.