The word "available" refers to something that is accessible, obtainable, or ready for use. When something is available, it means you can use it or that it is at your disposal. This can refer to physical items, services, information, or even individuals who can help with a task.
The word "available" comes from the Latin "valere," which means "to be strong, to be worth." The prefix "a-" comes from the Latin "ad," meaning "to" or "toward." Therefore, "available" essentially means "to be worth to have" or "to be at hand and ready for use."