-an

So, "an" is a little word that we use when we want to talk about one of something. It's called an "indefinite article," which means we don't know exactly which one we're talking about.

Now, the reason we use "an" instead of "a" is because of something called "vowel sounds." You know how we have different letters that make different sounds, like "a" and "e" and "i"? Well, sometimes, when we use the word "a," it doesn't sound very nice because it's too similar to the vowel sound of the word that comes after it. So, we use "an" instead to make it sound better when we say it out loud.

For example, if we were talking about an apple, we would say "an apple" instead of "a apple" because it just sounds better that way. But if we were talking about a banana, we would say "a banana" instead of "an banana" because the "b" sound is different from the vowel sound that comes after it.

So, that's basically what "an" means! It's just a little word that helps us talk about one thing without knowing exactly which one, and it sounds better than "a" in certain situations.