triathlon
Sports term for a triathlon, the endurance event combining swimming, cycling, and running. Used as a normal noun, often with に出場する, を完走する, or の大会.
Next month, I will compete in a triathlon for the first time.
She finished a triathlon competition.
I plan to compete in a triathlon for the first time next year.
After tough training, he managed to finish the triathlon.
A triathlon competition is held in this town every summer.