IPA: //ˈmʌltiˌspɔrt//
KK: /ˈmʌltiˌspɔrt/
Relating to or involving multiple sports or athletic activities.
The event was a multisport competition that included swimming, running, and cycling.
Multisport is formed from "multi-" (meaning many) and "sport" (from Old French *desport*, meaning activity or pastime). The word refers to many different sports or activities.
Think of 'many' ('multi-') activities or games when you hear 'multisport'.
No commonly confused words.