It's NEO.
The syllables 'mono-' make up a Latin prefix that comes from the earlier, ancient, classical Greek prefix of the same spelling. The original meaning of the Greek prefix is alone. The Latin prefix also takes on the meanings of 'lone' and 'single'.
Eight is an English equivalent of 'octa-'. The syllables represent a root and a prefix in the classical Latin of the ancient Romans. Both come from the earlier, classical Greek of the ancient Greeks.
The prefix "neo-" means new or recent. It is commonly used in words like neo-natal (newborn) or neo-classical (a recent style of art or music).
The classical Latin and Greek languages are the sources of 'octa-'. The syllables represent a Greek and Latin prefix that's borrowed by the English language. Use of the prefix gives the meaning of 'eight' to a word.
Prefix=IN
The prefix for inadequate is in-. The prefix in- means not.
Yes, prefix does have a prefix. The prefix is pur-.
The prefix for include is in-. This prefix means not.
Demi has no prefix; it IS a prefix.
The prefix is in. The prefix in- means not.
The prefix is in-. This prefix means not.
The prefix is micro.