This document discusses the Indonesian prefix "me-". It can be added to verbs, nouns, adjectives, numbers, places, and expletives to form new words or change the meaning. When added to verbs, it makes them active. For nouns, it can mean putting the noun on something, becoming the noun, or producing the noun. For adjectives, it indicates changing or turning into the adjective. For numbers, only "satu" and "dua" are used, to mean unite and split in two. Places prefixed with "me-" indicate going to that place, and expletives mean producing that sound. A consonant mutation table is provided to show spelling changes when prefix