A prefix is a group of letters added to the beginning of a root word that changes the word's meaning. Root words can have prefixes and suffixes added to form new words. Prefixes like "un" mean "not", while prefixes like "pre" mean "before in time". There are no strict rules for prefix usage but understanding a prefix's meaning can help determine the correct word. Stress is usually placed on the root word when adding prefixes, not on the prefix itself.

2. A prefix is a group of letters which you can add to the beginning of a root word * to change the meaning of the word. e.g. mis + fortune = mis fortune * A root word stands on its own as a word but you can make new words from it by adding beginnings (prefixes) and endings (suffixes). For example, ' comfort ' is a root word. By adding the prefix 'dis' and the suffix 'able' you can make new words such as 'dis comfort ' and ' comfort able'.

4. Here are some examples of prefixes and their meanings... means not (there are also several other prefixes which mean not) e.g. ' un hurt' means 'not hurt' un means 'before in time', 'in front of' or 'superior' e.g. ' pre- packed' means 'packed before' pre means under e.g. ' sub way' means 'a way under the ground' sub means 'wrong' or 'badly' e.g. ' mis spelled' or mis spell means 'wrongly spelled' mis Meaning Prefix

6. = visible + in = lead + mis = cycle + bi = mature + im = kind + un Word = Root word + Prefix