escarpments

/EH0 S K AA1 R P M AH0 N T S/
noun
  1. 1

    A steep descent or declivity; steep face or edge of a ridge; ground about a fortified place, cut away nearly vertically to prevent hostile approach.

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Source: https://en.wiktionary.org/wiki/escarpment, https://en.wiktionary.org/wiki/escarpments