IPA: /prɪˈdɒmɪnətlɪ/
KK: /prɪˈdɑːmɪnətli/
In a way that is the most common or most noticeable; mainly or mostly.
The population in the city is predominately young adults.
Predominately → It is formed from "pre-" (meaning before) and "dominari" (meaning to rule or dominate) and the suffix "-ly" (meaning in a manner). The word "predominately" means in a manner that rules or is prevalent before others.
Think of something that 'rules' ('dominari') 'before' ('pre-') everything else — that's why predominately means mostly or mainly.