preapprove
to authorize of give permission in advance
precaution
a measure taken in advance to prevent harm
precede
to come before something else in time, order, or rank
predict
to say what will happen before it occurs
prejudge
to make a decision before you have all of the facts
prepay
to pay for something before it needs to be paid in full
pretest
a test before the real test, usually given to see what is already known
prevent
to stop something from happening before it occurs
preview
to look at of see something before something or someone else