Strong's Greek #5424 - φρήν, φρενός, ἡ phrén (midriff)

understanding.

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

Strong's 5424: φρήν

φρήν, φρενος, ἡ, plural φρένες, from Homer down, the Sept. several times in Proverbs for לֵב:

1. the midriff or diaphragm, the parts about the heart.

2. the mind; the faculty of perceiving and judging: also in the plural; as, 1 Corinthians 14:20.

Strong's Greek: 5424. φρήν (phrén) — 2 Occurrences

1 Corinthians 14:20 - N-DFP
GRK: γίνεσθε ταῖς φρεσίν ἀλλὰ τῇ
NAS: do not be children in your thinking; yet
KJV: children in understanding: howbeit
INT: be in the minds but in the [regard to]

1 Corinthians 14:20 - N-DFP
GRK: ταῖς δὲ φρεσὶν τέλειοι γίνεσθε
NAS: be infants, but in your thinking be mature.
KJV: but in understanding be
INT: in the [regard to] however thinking full grown be