Prefixes or as they are also called “affixes” form meaningful words when they are attached to the start of a word.
Prefixes don’t have a meaning until they are joined to the start of some other word. It can be a single letter or a group of letters.
- Im (here “im” is the prefix, whereas possible is the stem)
- Il (In this word, “il” is the prefix making no meaning until it is attached to the stem “legal”)
|de||from, down, away, reverse, opposite||Demotivate, demoralize, etc.|
|ab||Bad/not||Abuse, abhor, etc.|
|il||not||Illegal, illogical, etc.|
|mis||Bad or wrong||Mislead, misplace, etc.|
|anti||Against or Opposite||Antiperspirant, antisocial, etc.|
|pro||for, forward or before||Proactive, profess, etc.|
|re||Again or back||Reunite, Remake, etc.|
|un||Against or opposite||Uninvited, unfaithful, etc.|