Inlet (noun)

1. A narrow arm of the sea that runs inland.
2. An opening in a coastline or riverbank through which water enters.

Origin:

Middle english (denoting an entrance or an opening in a wall): from old french, or from latin inlatus "carried in", past participle of inferre.

Examples:

1. The inlet led to a secluded beach.
2. The inlet provided a natural harbor for boats.
3. The inlet was a popular spot for kayaking.
4. The inlet was blocked by debris from the recent storm.
5. The inlet was home to a diverse range of marine life.