Validate (verb)

1. To make or declare something officially valid.
2. To check or prove the validity or accuracy of something.

Origin:

From the latin word "validus" which means "strong" or "effective" and the suffix -ate which denotes an action or process.

Examples:

1. The research findings were validated by an independent study.
2. The parking ticket needs to be validated before leaving the parking lot.
3. The data was validated before it was used in the analysis.
4. The results were validated by the experiment.
5. The theory was validated by the observations.