Abbott-Smith Manual Greek Lexicon
πλατύνω (G4115)
3 πλατύνω ( πλατύς ), [in LXX chiefly for רחב hi.;] to make broad , enlarge , extend : c. acc. rei, Mt 23:5 . Metaph. (cf. Ps 118 (119):32 , al.), pass., ἡ καρδία , II Co 6:11 ; ὑμεῖς , II Co 6:13 .†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain