What is "sheerer"

Usage examples of "sheerer".

Fek found the easiest descent for the rest of the party, zigzagging down some of the sheerer boulders which she would have managed quite easily with her natural advantages.

The robot ran around the sheerer cliffs, but where the slope was not too steep, it simply scrambled over them, scrabbling for purchase among cracks and ledges of stone.

For hours the climbers toiled upward on the fearsome scarps of black lava and obsidian, seeing the sheerer heights above them recede interminably into a cloudless zenith, as if not to be approached by man.