Beforehand (adverb)

1. In advance; prior to an event or a time.
2. With prior notice or preparation.

Origin:

Middle english, from before + hand.

Examples:

1. I wish I had known about the test beforehand.
2. He always pays his bills beforehand to avoid late fees.
3. We discussed the plan beforehand to ensure we were all on the same page.
4. I always like to prepare my lunch beforehand so I don't have to rush in the morning.
5. The company had a warning beforehand about the potential layoff but didn't act on it.