Answer
Intra- means “within” or “inside of”. A term that uses this element is intranasal.
Work Step by Step
Intra- comes from Latin and means “within” or “inside of”.
An example is intranasal from intra- “within” and nasal meaning “nose”. Intranasal means within the nasal cavity
Another example is intracranial from intra- “within” and cranial “head”. Intracranial means within the cranium.