General:
* precede: to go before something else in time or order
* precept: a rule or principle that guides behavior
* precise: exact and accurate
* predict: to say what will happen in the future
* prefer: to like something better than something else
* premature: happening before the usual or expected time
* premium: a payment made to an insurance company
* premonition: a feeling that something bad is going to happen
* prepare: to make something ready for use or an event
* preserve: to keep something safe or in good condition
* present: to give something to someone
* pressure: force that is applied to something
* pretend: to behave as if something is true when it is not
* prevent: to stop something from happening
Specific:
* pre-approve: to approve something in advance
* pre-existing: existing before something else
* pre-flight: before a flight
* pre-game: before a game
* pre-historic: relating to the time before recorded history
* pre-natal: relating to the time before birth
* pre-order: to order something in advance
* pre-paid: paid for in advance
* pre-school: a school for children before elementary school
* pre-surgery: before surgery
These are just a few examples, and there are many more words that start with the prefix "pre-".