Adjective.
Having a clear idea of what you intend to say, but because you're on the phone late with the girl that got away, you can't verbalize detailed information. In other words, being specific, without, being specific.
1. I understood how to make a crystal nightlight. The directions were specificy enough.
2. Hey girl, send me specificy details about tonight, and we'll figure it (it being exact details) out later.