Prefix is made up of two words Upa + Canto = Prefix, where Up means
English is covered at Hyphen > Prefixes and suffixes.
A prefix is a word part added to the beginning of a word or base word (for example, un-).
A prefix is a group of letters that is placed before the root of a word.
As the word is 'depart' there are no prefixes.
The prefix word of 'expensive' is 'in'. The new word formed is 'inexpensive.
Hydro- is a prefix that means water.
Pre- or Ante- are prefixes that mean before.
Post- is a prefix that means after.
antisocial which means non social