A suffix is a few letters put at the end of a word to change its meaning. It is a type of affix mostly used to show Inflection

Verb examples:

  • -ed
  • -or
  • -ing
  • -s
  • -ing
  • walk
  • walked
  • walker
  • walking
  • walks

Adjective examples:

  • -er
  • -est
  • easy
  • easier
  • easiest

Compare to prefix. Prefixes are letters put at the beginning of a word to change its meaning.