What is the prefixes for unusual?

There aren't any specific prefixes that directly mean "unusual". However, there are prefixes you can use to create words with a similar meaning, depending on what aspect of "unusual" you want to highlight. Here are some options:

For "not usual" or "uncommon":

* Un-: This is the most straightforward option, creating words like "uncommon", "unordinary", "unconventional".

* A-: This prefix can also convey a sense of "not", as in "atypical", "anomalous", "abnormal".

* Non-: This prefix means "not" and can be used to form words like "nonstandard", "nonconformist", "nontypical".

For "strange" or "peculiar":

* Exo-: This prefix means "outside", and can be used to indicate something unusual or foreign, as in "exotic".

* Para-: This prefix means "beside" or "beyond", and can be used to describe something deviating from the norm, as in "paranormal".

* Pseudo-: This prefix means "false", and can be used to indicate something resembling something else but not actually being it, as in "pseudonym".

For "remarkable" or "exceptional":

* Extra-: This prefix means "beyond", and can be used to describe something exceeding the ordinary, as in "extraordinary".

* Super-: This prefix means "above" or "beyond", and can be used to indicate something superior to the usual, as in "supernatural".

Remember that the best prefix to use will depend on the specific context and the intended meaning.