* Introduction: The act of introducing something or someone.
* Introvert: A person who is predominantly concerned with their own thoughts and feelings rather than with external things.
* Introspective: Characterized by or given to introspection, the examination or observation of one's own mental and emotional processes.
* Introit: The opening verse or verses of a psalm or hymn.
* Intromission: The act of introducing something into something else.
* Introscope: A device for examining the interior of a body or object.
* Introversion: The state of being introverted.
* Introductory: Serving to introduce something.
* Introgression: The transfer of genetic material from one species or population to another.
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