Regatta
Noun and の adjective
きょうてい
競艇で大儲けしました。
I made a killing in the boat race.
To compete in a rowboat is to take part in a boat race, also known as a regatta. Who are you gonna bet on?
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.