Available (adjective)

1. Able to be used or obtained.
2. Not already in use or already committed.
3. Able to be reached or communicated with.

Origin:

Late 15c., from middle french disponible, from latin disponibilis, from dis- + possibilis possible, from posse to be able.

Examples:

1. The book is available for purchase.
2. The room is available for rent.
3. The tickets for the concert are available now.
4. He was available for an interview.
5. The service is not available at this time.