infallible
/ɪnˈfælɪbəl/ adjective C2- Without fault or weakness; incapable of error or fallacy. · He knows about many things, but even he is not infallible.
- Certain to produce the intended effect; sure. · Try this infallible cure for hiccups.
- Certain to result from a specific cause; inevitable.
From the library
Don’t you see that it gives us an infallible test for blood stains.
His conclusions were as infallible as so many propositions of Euclid.
“This devil of a fellow,” he muttered, shaking his head; “I said at the time he would create a sensation here, and I measure his effect by an infallible thermometer.
However,” continued Monte Cristo, drawing a small phial from his pocket, “I have an infallible remedy.”
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