demarcation
Meaning: the marking of boundaries or categories
Usage: Different cultures have different demarcations of good and evil.
circumscribed
Meaning: marked off, bounded
Usage: The children were permitted to play tag only within a carefully circumscribed area of the lawn.
juxtaposition
Meaning: the act of placing two things next to each other for implicit comparison
Usage: The interior designer admired my juxtaposition of the yellow couch and green table.
precipice
Meaning: the face of a cliff, a steep or overhanging place
Usage: The mountain climber hung from a precipice before finding a handhold and pulling himself up.
cleave
contronym: split/divide senseMeaning: to split or divide
Usage: The axe cleaved the log into two pieces.