Non

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French

French equivalent to English "no"; Italian equivalent to English "not"; Latin equivalent to either "not" or "no". In French, when used at the end of a sentence, it is an interrogative which asks, "do you agree?"

Used in the sense of non-, to negate the meaning of the word to which it is prefixed.

The prefix non- may be joined to a word by means of a hyphen, which is standard in British usage. In many cases, especially in American usage, non-is joined without a hyphen.
Unlike un-, non- tends to suggest an absolute negation without the possibility of shades of comparison. For example, more unkind sounds quite natural, but more nonhelpful does not.
Meaning "not" in phrases taken from Latin and some other languages, non-is a separate word and is not hyphenated. Examples: non compos mentis, persona non grata.
As non- is a living prefix, the list of words having the prefix non- is practically unlimited. It is particularly common in the sciences.
Non-may be attached to nouns, verbs, adjectives or adverbs to negate their meaning.