Teeth, edges, knife blades, riverbanks, things that can be thought of as having two parallel edges.
The noun root -dirr- can occur inside the complex verb immediately before the verb root, where it can convey meanings ranging from literal to metaphorical.
Kurungurr Example:
Wudeni dirrfulirr.
He was grinding his teeth.
Kurungurr Example:
Dideninggi nganggininy dirrtyerr.
We pulled up on the opposite bank (of the river).