Boater (noun)

1. A person who operates a boat, especially for pleasure.
2. A person who is a passenger in a boat.
3. A type of flat-brimmed, stiff-crowned straw hat.

Origin:

The word is derived from the middle english word 'bater' meaning 'a flat-bottomed boat' or 'a person who rows a boat'.

Examples:

1. The boater expertly guided the boat through the rapids.
2. The boater enjoyed the peaceful ride down the river.
3. The boater waved to the other boats as they passed by.
4. The boater donned a stylish boater hat for the trip.
5. The boater was a seasoned veteran of many river adventures.