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The effect upon the judgment or feelings produced by any event, whether witnessed or participated in; personal and direct impressions as contrasted with description or fancies; personal acquaintance; actual enjoyment or suffering.

An activity one has performed.

A collection of events and/or activities from which an individual or group may gather knowledge, opinions, and skills.

The knowledge thus gathered.

Trial; a test or experiment.

To observe certain events; undergo a certain feeling or process; or perform certain actions that may alter one or contribute to one's knowledge, opinions, or skills.