General Words:
* precede: to come before something else in time or order
* predict: to say what will happen in the future
* prefer: to like something better than something else
* prepare: to make something ready for use
* present: to give something to someone
* preside: to be in charge of a meeting or event
* press: to push something firmly
* prevent: to stop something from happening
* previous: coming before something else in time
* prevail: to be successful or victorious
* preview: to see or hear something before it is released to the public
Scientific/Technical:
* precipitation: water that falls to the ground as rain, snow, or hail
* premature: happening too soon
* prehistoric: relating to the time before recorded history
* premeditated: planned in advance
* precancerous: relating to a condition that may develop into cancer
* preclinical: relating to the stage of research before clinical trials
* preprocessor: a program that processes a file before it is compiled
* prebiotics: substances that promote the growth of beneficial bacteria in the gut
* preemptive: done in advance to prevent something from happening
Other:
* pre-algebra: mathematics that prepares students for algebra
* pre-flight: a check of an aircraft before it takes off
* pre-workout: a supplement that is taken before exercise
* pre-approved: approved in advance
* pre-owned: used but in good condition
This is just a small sample of the many words with the prefix "pre." The prefix "pre" generally means "before" or "in advance."