Inerrant (adjective)

Not capable of error; free from error; infallible.

Origin:

From latin inerrans, present participle of inerrare ("to go astra.y")

Examples:

1. The Bible is considered inerrant by many Christians.
2. The GPS system is inerrant and always gives the accurate location.
3. His memory was inerrant, and he could recall every detail of the event.
4. The inerrant results of the experiment proved the hypothesis to be correct.
5. The inerrant accuracy of the machine was tested multiple times.