Con is usually translated by English "with", both in the sense of accompaniment (con mi hermano, "with my brother") and in the instrumental sense (con un martillo, "with a hammer"). Unlike other prepositions, con combines with the prepositional pronouns mí, ti, and sí in the forms conmigo (“with me”), contigo (“with you”), and consigo (“with her-, himself”). These forms are derived historically from forms with the Latin preposition cum postposed to its object: mēcum, tēcum, etc.