1. Pre-: Means "before" or "in front of".
* Examples: pregame, preschool, premonition
2. Un-: Means "not" or "opposite of".
* Examples: unhappy, unlock, unclear
3. Re-: Means "again" or "back".
* Examples: rewrite, redo, replay
4. Mis-: Means "wrongly" or "badly".
* Examples: misunderstand, misplace, misbehave
5. Sub-: Means "under" or "below".
* Examples: submarine, subway, submerge