Back, topside, raised surfaces, humps, ridges, convex shapes.
The noun root -derri- can occur inside the complex verb immediately before the verb root, where it can convey meanings ranging from literal to metaphorical. -Derri 'humps' occurs in many oppositions to -madi 'hollows'.
Kurungurr Example:
Ngemen derri pal.
I bowed, bent forward from the waist (lit: I folded myself at the back).
Kurungurr Example:
Yemi derribirr pe!
Travel along the top of the ridge!