Revelation of Jesus Christ
From the KJV 1611 with Strong's Concordance
G5424
φρήν
phren
{frane}
Probably from an obsolete φράω [[phrao]] (to rein in or curb; compare G5420); the midrif (as a partition of the body), that is, (figuratively and by implication of sympathy) the feelings (or sensitive nature; by extension [also in the plural] the mind or cognitive faculties).
understanding
1 Corinthians 14:20.