which means “not,” appears in hundreds of English vocabulary words, such as non sense, non fat, and non returnable. 
A prefix is a letter or a group of letters that attaches to the beginning of a word and helps to indicate or modify its meaning. An easy example would be the word ‘prefix’ itself! It begins with the prefix pre- , which means ‘before’. A prefix is a part of a word or a word, within a word. It is put at the start of another word to make a different meaning. It can also mean a number that is put in at the start to show which number something is in a group. It is a type of affix. 1  Grand father means your parent's father. The English prefix non- , which means “not,” appears in hundreds of English vocabulary words, such as non sense, non fat, and non returnable. You can remember that the prefix non-means “not” via the word non poisonous, for a substance that is non poisonous is “not” poisonous. For example, non-means ‘not’ or ‘without’, this is used in words such as ‘nonsense’. The word ‘sense’ can be separated from the prefix and it would still be a word on its own, even if the meaning is different. 1 Examples: non compos mentis, persona non grata. 2  As non-is a living prefix, the list of words having the prefix non-is practically unlimited. 3  It is particularly common in the sciences. 4  Non-may be attached to nouns, verbs, adjectives or adverbs to negate their meaning. 1 As non-is a living prefix, the list of words having the prefix non-is practically unlimited. 2  It is particularly common in the sciences. 3  Non-may be attached to nouns, verbs, adjectives or adverbs to negate their meaning. : a letter or group of letters that is added at the beginning of a word to change its meaning. — compare affix, suffix. Add the prefix “re-” to form the words “retell” and “recall.”. [+] more examples [-] hide examples [+] Example sentences [-] Hide examples. A prefix is placed at the beginning of a word to change its meaning. For example, the suffix re-means either again or back as in return, repeat or refurbish.
http://www.myenglishteacher.eu/blog/prefixes-suffixes-list/ https://simple.wikipedia.org/wiki/Prefix http://membean.com/wrotds/non-not http://www.myenglishteacher.eu/blog/prefixes-suffixes-list/ https://en.wiktionary.org/wiki/non- https://en.wiktionary.org/wiki/non- http://www.learnersdictionary.com/definition/prefix http://www.ecenglish.com/learnenglish/lessons/prefixes-un-dis-im-mis
the prefix non means