1.
word part added to the beginning of a word
2.
to see something before it's available
3.
to heat before it's needed
6.
education before formal schooling
7.
occurring before formal records of time
8.
to form an opinion based on prior experience
9.
to occur before the expected time
10.
to get ready ahead of time
11.
to occur prior to the main event
12.
to reserve ahead of time
13.
to get the "go ahead" before it happens
14.
to warn of danger before it happens
15.
to consume your mind before it happens
16.
to come before something else
17.
what leads up to an event
18.
done so something else doesn't occur
19.
to be done so something else can occur
20.
the person who filled the position before
