As a Noun:
1. The act of jumping head first into water. English = dive.
2. A person who jumps head first into water as a sport. English = diver.
3. A board high above a swimming pool from which people can dive into the water. English = diving board.
4. Someone who swims underwater wearing special breathing apparatus. English = diver.
As a Verb or Adjective:
1. To jump head first into water. English = dive.