Probably from an obsolete phrao (to rein in or curb; compare phrasso); the midrif (as a partition of the body), i.e. (figuratively and by implication, of sympathy) the feelings (or sensitive nature; by extension (also in the plural) the mind or cognitive faculties) -- understanding.

see GREEK phrasso

φρεσίν (phresin) − 2 Occurrences