The word Mnem appears very often, but what does it mean? I found many explanations for what the individual things with Mnem in their name are, however I could not found anything about the word it self.
MNEM means "memory" in the in-universe language Ehlnofex. It is taken from the ancient Greek mnēmonikós, meaning "of memory", which is also the origin of words like mnemonic in English, where it refers to something that assists the memory.