One of a pair of terms that name or describe a relationship from opposite perspectives; converse antonym; relational antonym.
Free verbal interchange of thoughts or views; conversation; chat.
The opposite or reverse.
Of a proposition or theorem of the form: given that "If A is true, then B is true", then "If B is true, then A is true.".
opposite; reversed in order or relation; reciprocal
To keep company; to hold intimate intercourse; to commune.
To talk; to engage in conversation.
One's sibling or kin via a godfamily tie: one's or one's child's godparent, or one's godchild's parent, or one's godparent's child.