Definition
A 'prefix' is an affix that's attached to the beginning of a word to change its meaning. It's like adding a header to a document π. Common prefixes include 'un-', 're-', and 'pre-'. Prefixes can indicate negation, repetition, or time. They are efficient ways to modify the meaning of a root word. Understanding prefixes can help you quickly decipher new words. They're essential tools for vocabulary expansion.