A shoe of an American-based brand of that name.

(now literary) Free verbal interchange of thoughts or views; conversation; chat.

The opposite or reverse.

(logic) 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.".

(semantics) One of a pair of terms that name or describe a relationship from opposite perspectives; converse antonym; relational antonym.

(formal, intransitive) To talk; to engage in conversation.

(followed by with) To keep company; to hold intimate intercourse; to commune.

Opposite; reversed in order or relation; reciprocal.