Pre- means before, in advance
preapprove (v) - to authorize or give permission in advance
precaution (n) - a measure taken in advance to prevent harm
precede (v) - to come before something else in time, order, or rank
predict (v) - to say what will happen before it occurs
prefix (n) - a syllable or word that comes before a root word to change its meaning
prejudge (v) - to make a decision before you have all of the facts
prepay (v) - to pay for something before it needs to be paid in full
pretest (n) - a test before the real test, usually given to see what is already known
prevent (v) - to stop something from happening before it occurs
preview (v) - to look at or see something before something or someone else