pentathlete

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A sportsperson who competes in five different events like running and swimming

noun
/ˈpɛnˌtæθlit/

: pentatleta

Only a few athletes can handle the diverse challenges faced by a pentathlete in competitions.
a modern pentathlete
a top pentathlete
a U.S. pentathlete

Examples

I guess she's only the 11th best pentathlete in the world.

Personal Best (1982)
High school pentathlete...

Fiction book (1997)
Pentathlete.

Personal Best (1982)
At the 1968 Olympics, Swedish pentathlete Hans-Gunnar Liljenwall was disqualified.

Blog text (5)
Sheila Taormina is an accomplished pentathlete who has competed in several Olympic events.
The training regimen for a pentathlete includes swimming, fencing, and running.

Surface Forms

pentathlete singular

pentathletes plural

Morphology

pentathlete = athlete (transparent) = pent + athlete

The prefix 'pent-' clearly indicates five, and 'athlete' retains its meaning, making the combination straightforward.

Etymology

Pentathlete comes from the Greek part penta- meaning 'five' and the word athlete, a person who does sports. Think of a pentagon, a five-sided shape, to remember 'five', so a pentathlete is an athlete who takes part in five different events.