semi-basement
semibasement

It comprises 14 high-ceiling floors plus a basement, a semibasement and a central tower, which is currently topped by mobile communication antennas.

There, one of them, with her feet dragging, Slowly emerges upon her threshold And, climbing out of her semibasement, Goes eater-corner across the yard.

The low point in this regard came in one semibasement hole in Alexandria, a tiny dark place barred for safety at the door and the single high window, so that it looked like a prison for troglodytes; and two thousand a month.