nail down (someone or something)
to make certain or sure of something
I am trying to nail down the exact time that the meeting will begin.
Interior Design Ideas
Samuel and Caitlin Dowe Sandes, the owners of Moroccan tile company Popham Design have decorated their riad, in the heart of Marrakechs medina, using crisp colour and pieces sourced from the local souk. Utilizing a small narrow space, the blue wall draws the eye to the back of the room where the bed had been placed on a raised platform.