STEP Greek Lexicon: πλατύνω

πλατύνω

(πλατύς), [in LXX chiefly for רָחַב hi. ;]

to make broad, enlarge, extend: with accusative of thing(s), Mat.23:5. Metaphorical (cf. Psa.119:32, al.), pass., ἡ καρδία, 2Co.6:11; ὑμεῖς, 2Co.6:13.†

(AS)