Let's say that there is a wall which is, for lack of a better word, "hollowed out". Hollowed here meaning a chunk is removed to leave behind an empty space (orange coloured block) in the image. Now, you cannot call this hollowed out as it would imply that the entire exterior is intact and an empty space is created in the interior. But in this instance, a part of the exterior along with the interior is removed out. What will you call this ?
e.g. sentence - The wall had been "______" to make space for the new installation.