Here are some examples:
* Semicircle: A half circle.
* Semifinal: A stage in a competition that is halfway to the final.
* Semiannual: Occurring twice a year.
* Semiconscious: Partially conscious.
* Semitransparent: Partially transparent.
The prefix "semi-" indicates that something is not fully complete or whole, but rather a part or portion of something else.