IPA: //ˌmʌltiˈɛθnɪk//
KK: /mʌltiˈɛθnɪk/
Relating to or made up of people from different ethnic groups.
The city is known for its multiethnic community, where various cultures coexist peacefully.
Multiethnic → It is formed from "multi-" (meaning many) and "ethnic" (from Greek "ethnos", meaning nation or people). The word "multiethnic" refers to a society or group that consists of many different ethnic groups or nationalities.
Think of 'many' ('multi-') different 'nations' or 'people' ('ethnos') coming together — that's what multiethnic means.
No commonly confused words.