prefixation

/ˌpriːfɪkˈseɪʃən/
noun
  1. The process of adding a prefix to a word to create a new word.
    • The prefixation of 'un-' to 'happy' gives us 'unhappy'.
    • Prefixation is a common way to form new words in English.
    • Students learn about prefixation when studying word formation.
Antonyms
What does "prefixation" mean? | whatsthatwordmean | whatsthatwordmean