colpos, = the lap or fold formed by a loose garment; any lap or hollow.
colpoo, коλπόω, = to form into a lap or fold: to make a sail belly or swell. (LS)
comprimo, compressum, = to press or squeeze together, compress; pressed together, i.e. close, straight, narrow.
(flattened, usually laterally) (ld, BL)