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Meanings of prove inefficacious in English

We have no meanings for "prove inefficacious" in our records yet.
Usage of prove inefficacious in English
1
As this proved inefficacious, he resorted to other means.
The Legends of the Jews — Volume 4
2
Their poison proved inefficacious, and so shall their love!
The Youth of the Great Elector
3
When even this remedy proves inefficacious, and the patient survives it, the illness is pronounced incurable!
In the Forbidden Land / An account of a journey in Tibet, captur...
4
"Simply if it should prove inefficacious in the form of a request."
Vittoria — Volume 1
5
Unhappily it proved inefficacious.
The Inside Story of the Peace Conference