Mercury in the 7th house activates dialogue with a partner, client, ally, or opponent. The period brings agreements, terms, mutual expectations, legal wording, and the ability to hear not only your own thought but also the other person's position to the surface.
This is a time for negotiations, consultations, relationship discussions, contracts, reconciliations, and public conversations. Mercury here asks not for beautiful politeness, but for precise tuning of the union: who promises what, where the deadline is, which role belongs to whom, and which words are already ready to be spoken.

