IPA: /ˈmʌltɪplaɪər/
KK: /ˈmʌl.tɪ.plaɪ.ər/
A number or device that increases another number or effect by multiplication.
In the equation 5 x 3, 5 is the multiplier that increases 3 to 15.
Multiplier → It is formed from "multi-" (meaning many) and "plicare" (meaning to fold). The word "multiplier" refers to something that folds or increases a quantity many times.
Think of 'many' ('multi-') being 'folded' ('plicare') together to create a larger amount — that's what a multiplier does.