Despite being vertical, the rock here always offers tiny rugosities that enable free climbing, albeit of extreme difficulty.

In the case of climbing, it's the rock's rugosities-thetiny edges and wrinkles-catchingour hands and feet that create friction.

There were to be no shadows in the picture, no stains or rugosities on the smooth bust of rosy wax.

The sun was rising from the sea's horizon, and touched with golden spangles the prismatic rugosities of the huge precipice.

The rugosities of the stony pasture land end in a wooded point seaward, and curve east and north in a succession of beaches.

I tensioned off a nut I'd chopped a slot for; thinly gloved hands search for usable rugosities while crampon claws scratched at scaly granite.