In
linguistics,
converses or
relational antonyms are pairs of words that refer to a relationship from opposite points of view, such as
parent/child or
borrow/lend. The relationship between such words is called a
converse relation. Converses can be understood as a pair of words where one word implies a relationship between two objects, while the other implies the existence of the same relationship when the objects are reversed. Converses are sometimes referred to as complementary
antonyms because an "either/or" relationship is present between them. One exists only because the other exists.