φρήν, φρενος, ἡ, plural φρένες, from Homer down, the Sept. several times in Proverbs for μΕα: 1. the midriff or diaphragm, the parts about the heart. 2. the mind; the faculty of perceiving and judging: also in the plural; as, 1Co_14:20.

φρήν phrēn 2x pr. the diaphragm, midriff; the mind, intellect, understanding, 1Co_14:20 (2x)

φρήν , gen ., φρενός , ἡ , [in LXX most freq . in Pr ( Pro_6:32 , al. ) and chiefly for H3820 ; also 3Ma_4:16 ; 3Ma_5:47 ;] chiefly in Hom . and Trag ., but also in Plat ., al ., both sing. and pl .; 1. in physical sense, the parts about the heart, midriff . 2. heart, mind, thought: pl., 1Co_14:20 ( v. Edwards, Eng.- Gr . Lex., App ., 1).†

φρήν [page 675] From its physical sense of midriff or the parts about the heart, φρήν comes to be applied to the heart or mind itself, in the plur. as in 1Co. 14:20 : cf. the magic PSI I. 28 .22 (iii/iv B.C.?) σὰς φρένας τέρπει , P Leid W xvii. 46 (ii/iii A.D.) ὄνομά σου καὶ πνεῦμά σου ἐπ᾽ ἀγαθεοῖς ( l. ἀλαθοῖς ) νοῦν καὶ τὰς ῞εμὲ῝ ἐμὰς φρένας , P Lond 46 .327 (iv/A.D.) (= I. p. 75) καταδεσμεύω δὲ αὐτοῦ τὸν νοῦν καὶ τὰς φρένας and Wόnsch AF p. 20 .56 (iii/A.D.) βασάνισον αὐτῶν τὴν διάνοιαν τὰς φρένας τὴν αἴσθησιν .

φρήν properly = διάφραγμα, "the midriff or muscle which parts" the heart and lungs "(viscera thoracis)" from the lower viscera "(abdominis)", Aesch. ; usually in pl., Arist. , etc. in Hom. , φρήν or φρένες = "the parts about the heart, the breast", Lat. praecordia, Il. ; φρένες ἀμφιμέλαιναι id=Il. "the heart", as the seat of the passions, Hom. , etc.; ἐκ φρενός from one's "very heart", Aesch. ; φῦσαι φρένας to produce "a haughty spirit", Soph. "the heart or mind", as the seat of thought, φρενὶ νοεῖν, ἐπίστασθαι Il. , etc.; μετὰ φρεσὶ μερμηρίζειν Od. ; κατὰ φρένα εἰδέναι, γνῶναι Il. , etc.; κατὰ φρένα καὶ κατὰ θυμόν, as in Lat. mens animusque, id=Il. ;—hence men lose their φρένες, i. e. their "wits", Od. ; πλήγη φρένας ἃς πάρος εἶχεν Il. ;—so, in attic, φρενῶν ἀφεστάναι, ἐκστῆναι to be out of "one's wits", Soph. , Eur. ; ποῦ ποτ᾽ εἰ φρενῶν; "satisne sanus es?" Soph. ; φρενῶν ἐπήβολος in possession of "one's senses", id=Soph. ; ἔνδον φρενῶν Eur. ; ἐξ ἄκρας φρενός, i. e. superficially, Aesch. of beasts, Il. "will, purpose", Soph.

φρήν genitive, φρενός, ἡ, [in LXX most frequently in Pr (Pro.6:32, al.) and chiefly for לֵב; also 3Ma.4:16 3Mac 5:47 ;] chiefly in Hom. and Trag., but also in Plat., al., both sing. and pl.; __1. in physical sense, the parts about the heart, midriff. __2. heart, mind, thought: pl., 1Co.14:20 (see Edwards, Eng.-Gr. Lex., App., 1).† (AS)