IPA: /ˌmʌl.tɪˈmɪl.jən/
KK: /mʌltɪˈmɪljən/
A sum of money that is in the millions, often used to describe large financial amounts or wealth.
The company reported a multimillion dollar profit this year.
Multimillion → It is formed from "multi-" (meaning many) and "million" (from Latin "mille", meaning thousand, with the suffix "-ion" indicating a quantity). The word "multimillion" refers to a quantity that is many thousands, specifically in the millions.
Think of 'many' ('multi-') thousands ('million') to remember that 'multimillion' refers to a large number in the millions.
No commonly confused words.