The word breakfast is made from two little words:
and 
Let's look at these two words.
Break means many different things. You can break a
leg,

take a break,

or break in your new shoes.

One definition of break is to stop.

Fast has two definitions that are very different! We know the
adjective fast means quick and speedy.

There is a verb to fast that means you do not eat
for a while. This is called a fast from food. You do
not eat for many hours when you sleep. You fast during the night
unless you sleepwalk to the refrigerator!


So, the word


literally means
STOP NOT EATING!
or
GO EAT!